the reaction r to an injection of a drug is related to the dose x (in milligrams) according to the following. r(x) = x2 700 − x 3 find the dose (in mg) that yields the maximum reaction.

Answers

Answer 1

the dose (in mg) that yields the maximum reaction is 1800 mg (rounded off to the nearest integer).

The given equation for the reaction r(x) to an injection of a drug related to the dose x (in milligrams) is:

r(x) = x²⁷⁰⁰ − x³

The dose (in mg) that yields the maximum reaction is to be determined from the given equation.

To find the dose (in mg) that yields the maximum reaction, we need to differentiate the given equation w.r.t x as follows:

r'(x) = 2x(2700) - 3x² = 5400x - 3x²

Now, we need to equate the first derivative to 0 in order to find the maximum value of the function as follows:

r'(x) = 0

⇒ 5400x - 3x² = 0

⇒ 3x(1800 - x) = 0

⇒ 3x = 0 or 1800 - x = 0

⇒ x = 0

or x = 1800

The above two values of x represent the critical points of the function.

Since x can not be 0 (as it is a dosage), the only critical point is:

x = 1800

Now, we need to find out whether this critical point x = 1800 is a maximum point or not.

For this, we need to find the second derivative of the given function as follows:

r''(x) = d(r'(x))/dx= d/dx(5400x - 3x²) = 5400 - 6x

Now, we need to check the value of r''(1800).r''(1800) = 5400 - 6(1800) = -7200

Since the second derivative r''(1800) is less than 0, the critical point x = 1800 is a maximum point of the given function. Therefore, the dose (in mg) that yields the maximum reaction is 1800 mg (rounded off to the nearest integer).

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Related Questions

Probability and Statistics for Engineering and the Sciences (8th Edition) Chapter 5, Problem 25E

What is the point of Step 1 in the step-by-step solution?

Answers

The step 1 in the step-by-step solution for the problem number 25E from Chapter 5 of Probability and Statistics for Engineering and the Sciences (8th Edition) serves to represent the probability density function as a function of the data.

The accompanying data represent the age (in years) of 50 randomly selected people:27.9 45.6 42.4 39.1 48.6 39.0 38.5 47.5 41.8 49.1 34.1 34.4 40.6 45.3 37.1 36.0 46.3 42.6 32.7 36.2 34.5 31.9 31.5 43.6 37.5 38.2 43.3 49.2 50.7 41.8 40.0 51.7 48.0 48.7 43.5 36.3 30.4 37.5 32.4 45.7 35.4 39.9 47.8 39.5 39.3 41.7 35.8 46.9 43.1 35.6Construct a histogram for the data, using the classes indicated.

Then sketch the graph of a probability density function that might reasonably be used to model these data. Use the graph to estimate the following probabilities:(a) P(age > 40)(b) P(30 < age < 50)(c) P(age < 35)The step-by-step solution to the problem is as follows:Step 1The given data represents the random variable age (in years) of 50 people, therefore, it is continuous.

The data can be represented in the form of a histogram with the given classes as shown below:The frequency of each class is calculated by counting the number of data points in each class. The height of each bar is the frequency density, which is the frequency of the class divided by the width of the class. The height of the bar is given as the probability density function that might reasonably be used to model these data.

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62 write the equation of the parabola that has its x‑intercepts at (5, 0) and (−6, 0) and its y‑intercept at (0, −1).

Answers

The equation of the parabola is y = -0.0285714x^2 + 0.257143x - 1.

To find the equation of a parabola, we need to start by determining its general form, which is given by y = ax^2 + bx + c, where a, b, and c are constants.

Step 1: Finding the value of 'a':

Since the parabola has its x-intercepts at (5, 0) and (-6, 0), we know that when x = 5 and x = -6, the corresponding y-values are both zero. Plugging these values into the general form equation, we get two equations:

0 = a(5)^2 + b(5) + c

0 = a(-6)^2 + b(-6) + c

Simplifying these equations, we get:

25a + 5b + c = 0   ----(1)

36a - 6b + c = 0   ----(2)

Step 2: Finding the value of 'c':

We know that the y-intercept of the parabola is at (0, -1). Plugging these values into the general form equation, we get:

-1 = a(0)^2 + b(0) + c

-1 = c

Step 3: Solving for 'b':

Substituting the value of c = -1 into equations (1) and (2), we get:

25a + 5b - 1 = 0

36a - 6b - 1 = 0

Solving these equations simultaneously, we find:

a ≈ -0.0285714

b ≈ 0.257143

Therefore, the equation of the parabola is:

y = -0.0285714x^2 + 0.257143x - 1.

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Nina can ride her bike 63, 360 feet in 3, 400 seconds, and Sophia can ride her bike 10 miles in 1 hour. What is Nina's rate in miles per hour f there are 5, 280 feet in a mile? 12.7 mph Which girl bikes faster?

Answers

Given that Nina can ride her bike 63,360 feet in 3,400 seconds and Sophia can ride her bike 10 miles in 1 hour. We need to calculate Nina's rate in miles per hour. If there are 5,280 feet in a mile, To calculate the miles ridden by Nina, we have to convert the feet to miles.

Therefore,Divide 63,360 feet by 5,280 feet/mile.63,360 feet/5,280 feet/mile=12 milesNina rode her bike for 12 miles.Now, we have to calculate the rate of Nina in miles per hour. In order to do that, we have to convert seconds into hours by dividing the number of seconds by 3600 (the number of seconds in an hour).

The rate of Nina in miles per hour = (12 miles)/(3,400 seconds/3600 seconds/hour) = 4/85 miles per hour ≈ 0.04706 miles per hour ≈ 12.7 miles per hourTherefore, the rate of Nina is approximately 12.7 mph. To compare, Sophia's rate was 10 mph.Nina bikes faster than Sophia as Nina's rate (12.7 mph) is more than Sophia's rate (10 mph). Hence, the answer is Nina.

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A circle of 50 flags surrounds the Washington Monument. Suppose a new sidewalk 12 feet wide is installed just around the outside of the circle of flags. The outside circumference of the sidewalk is 1.10 times the circumference of the circle of flags.

Write an equation that equates the outside circumference of the sidewalk to the 1.10 times the circumference of the circle of flags. Solve the equation for the radius of the circle of flags.

Answers

Answer:

  2π(r+12) = 1.10(2πr)

  radius: 120 feet

Step-by-step explanation:

You want an equation and solution for the radius of the circle of flags, given that adding a sidewalk 12 ft wide increases the circumference of the circle to 1.10 times the original circumference.

Relation

Let r represent the radius of the circle of flags, the value we want to know. Then ...

  2π(r+12) = 1.10(2πr) . . . . . equation for finding r

Solution

Dividing by 2π and subtracting r gives ...

  r +12 = 1.10r

  12 = 0.10r

  120 = r . . . . . . multiply by 10

The radius of the circle of flags is 120 feet.

__

Additional comment

Since the circumference is proportional to the radius, increasing the circumference by 10% means the radius was increased by 10%. That 10% increase is given as 12 feet, so the radius is (12 ft)/(0.10) = 120 ft, as above. No equation is needed.

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Iron Man wants to invest $1000 into a bank account to make some money. The Wolf Bank offers to add an interest of $268.40 each year your money is invested in their bank. At the Golden Lion Bank, you receive 20% interest on all of the money in your account compounded annually (i.e. each year).

Answers

It would be more beneficial for Iron Man to choose the Golden Lion Bank to maximize his returns on the $1000 investment.

If Iron Man wants to invest $1000, he has two options: the Wolf Bank and the Golden Lion Bank. Let's compare the two options:

Wolf Bank:

The Wolf Bank offers an interest of $268.40 each year. If Iron Man invests $1000, he will receive an additional $268.40 each year. The total amount in his account after one year would be $1000 + $268.40 = $1268.40.

Golden Lion Bank:

At the Golden Lion Bank, Iron Man will receive 20% interest on all of the money in his account compounded annually. After one year, the amount in his account would be $1000 + ($1000 * 0.2) = $1200.

Comparing the two options, Iron Man would have more money in his account after one year if he chooses the Golden Lion Bank. The interest rate of 20% compounded annually is higher than the fixed interest rate offered by the Wolf Bank.

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e 6xy dv, where e lies under the plane z = 1 x y and above the region in the xy-plane bounded by the curves y = x , y = 0, and x = 1

Answers

The problem involves evaluating the integral of 6xy over a specific region in three-dimensional space. The region lies beneath the plane z = 1 and is bounded by the curves y = x, y = 0, and x = 1 in the xy-plane.

To solve this problem, we need to integrate the function 6xy over the given region. The region is defined by the plane z = 1 above it and the boundaries in the xy-plane: y = x, y = 0, and x = 1.

First, let's determine the limits of integration. Since y = x and y = 0 are two of the boundaries, the limits of y will be from 0 to x. The limit of x will be from 0 to 1.

Now, we can set up the integral:

∫∫∫_R 6xy dv,

where R represents the region in three-dimensional space.

To evaluate the integral, we integrate with respect to z first since the region is bounded by the plane z = 1. The limits of z will be from 0 to 1.

Next, we integrate with respect to y, with limits from 0 to x.

Finally, we integrate with respect to x, with limits from 0 to 1.

By evaluating the integral, we can find the numerical value of the expression 6xy over the given region.

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A random sample of 150 teachers in an​ inner-city school district found that​ 72% of them had volunteered time to a local charitable cause within the past 12 months. What is the standard error of the sample​ proportion?
a. 0.037
B. 0.057
C. 0.069
D. 0.016

Answers

The given information is as follows:A random sample of 150 teachers in an​ inner-city school district found that​ 72% of them had volunteered time to a local charitable cause within the past 12 months.

The formula for calculating the standard error of sample proportion is given as:$$Standard[tex]\ error=\frac{\sqrt{pq}}{n}$$[/tex]where:p = proportion of success in the sampleq = proportion of failure in the samplen = sample sizeGiven:Sample proportion, p = 72% or 0.72Sample size, n = 150

The proportion of failure in the sample can be calculated as:q = 1 - p= 1 - 0.72= 0.28Substituting the known values in the above formula, we get:[tex]$$Standard \ error=\frac{\sqrt{pq}}{n}$$$$=\frac{\sqrt{0.72(0.28)}}{150}$$$$=0.0372$$[/tex]Rounding off to the nearest thousandth, we get the standard error of sample proportion as 0.037

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5. Given Z₁ = 6(cos 26° + i sin 26°) and z₂ = 3 (cos 12° + i sin 12°), find each of the following. Leave your answers in polar form. a) Z₁ Z₂ Z1 b) 21 22

Answers

$\frac{Z_1}{Z_2}$ is $2(\cos14° + i\sin14°)$ in polar form.

a) $Z_1Z_2$:

Since Z1 and Z2 are both in polar form, they can be multiplied by multiplying the magnitudes and adding the angles:

$Z_1 Z_2 = 6(\cos26° + i\sin26°) \cdot 3(\cos12° + i\sin12°)\\ = 18 (\cos 38° + i \sin 38°)$

Hence, $Z_1Z_2$ is $18 (\cos 38° + i \sin 38°)$ in polar form.

b) $\frac{Z_1}{Z_2}$:$\frac{Z_1}{Z_2}=\frac{6(\cos26° + i\sin26°)}{3(\cos12° + i\sin12°)}\\=2(\cos14° + i\sin14°)$

Therefore, $\frac{Z_1}{Z_2}$ is $2(\cos14° + i\sin14°)$ in polar form.

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in δrst, m∠r=(6x 10)∘m∠r=(6x 10)∘, m∠s=(2x 5)∘m∠s=(2x 5)∘, and m∠t=(3x−11)∘m∠t=(3x−11)∘. find m∠r.m∠r.

Answers

Given that in δrst, m[tex]∠r = (6x + 10)°[/tex], m[tex]∠s = (2x + 5)°[/tex], and m [tex]∠t = (3x - 11)°[/tex]. We need to find m ∠r. Let's use the angle sum property of the triangle to find the value of m ∠r as follows; The sum of the angles of a triangle is 180°.

Therefore, m[tex]∠r + m ∠s + m ∠t = 180°(6x + 10)° + (2x + 5)° + (3x - 11)° = 180°11x - 6° = 180°11x = 180° + 6°11x = 186°x = 186°/11m∠r = (6x + 10)°= (6(186°/11) + 10)°= (1116°/11 + 110/11)°= (1226°/11)°m ∠r = 111.45° or 111.4°[/tex](rounded to one decimal place) Therefore, m ∠r is approximately equal to [tex]111.4°[/tex] or [tex]111.45°[/tex]. Thus, the required solution.

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solve the system of equations using elimination. −3x 2y = 9 x y = 12 (−3, 0) (1, 6) (3, 9) (5, 7)

Answers

The solution of a system of equations using elimination is x = 3 and y = 9. Hence option 3 is true.

Given that;

The system of equations,

- 3x + 2y = 9

x + y = 12

Now solve the system of equations using the elimination method

-3x + 2y = 9....... Equation 1

x + y = 12 .......... Equation 2

Multiply the 2nd equation with 3;

3x + 3y = 36  .... equation 3

Now, Add equation 3 and Equation 1;

5y = 45

y = 45/5

y = 9

From equation 2;

x + y = 12

x + 9 = 12

x = 12 - 9

x = 3

Therefore, the solution of a system of equations using elimination is x = 3 and y = 9. Hence option 3 is true.

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To solve the system of equations using elimination:

−3x + 2y = 9

x + y = 12

We can multiply the second equation by 3 to eliminate the x term:

(3)(x + y) = (3)(12)

This simplifies to:

3x + 3y = 36

Now, we can add the two equations together to eliminate the x term:

(-3x + 2y) + (3x + 3y) = 9 + 36

5y = 45

Next, we can solve this new equation for y:

5y = 45

y = 9

Now, we can substitute this value of y back into one of the original equations. Let's use the second equation:

x + y = 12

x + 9 = 12

x = 12 - 9

x = 3

Therefore, the solution to the system of equations is:

(x, y) = (3, 9)

So the correct answer is:

(3, 9)

Discrete Math.
Write the converse, inverse, and contrapositive of
a) "If Ann is Jan’s mother, then Jose is Jan’s cousin."
b) "If Ed is Sue’s father, then Liu is Sue’s cousin."
c) "If Al is Tom’s cousin, then Jim is Tom’s grandfather."

Answers

The converse, inverse, and contrapositive can be written as follows:

a) Converse: "If Jose is Jan's cousin, then Ann is Jan's mother."

Inverse: "If Ann is not Jan's mother, then Jose is not Jan's cousin."

Contrapositive: "If Jose is not Jan's cousin, then Ann is not Jan's mother."

b) Converse: "If Liu is Sue's cousin, then Ed is Sue's father."

Inverse: "If Ed is not Sue's father, then Liu is not Sue's cousin."

Contrapositive: "If Liu is not Sue's cousin, then Ed is not Sue's father."

c) Converse: "If Jim is Tom's grandfather, then Al is Tom's cousin."

Inverse: "If Al is not Tom's cousin, then Jim is not Tom's grandfather."

Contrapositive: "If Jim is not Tom's grandfather, then Al is not Tom's cousin."

How to solve Discrete Maths?

Opposition, Inversion, Contrast refer to conditional statements that are "if-then" statements.

The converse of a conditional statement is formed by exchanging the hypothesis and the conclusion of the original statement. For example, reversing ``If Anne is Jean's mother, Jose is Jean's cousin'' becomes ``If Jose is Jean's cousin, Anne is Jean's mother.''

The inverse of a conditional statement is formed by negating both the hypothesis and the conclusion of the original statement. For example, "If Anne is Jean's mother, Jose is Jean's cousin" is reversed to "If Anne is not Jean's mother, Jose is not Jean's cousin".

The contrapositive of the conditional statement is formed by exchanging the conclusion of the hypothesis and the inverse statement. It is also formed by denying both the hypothesis and the conclusion of the counterstatement. For example, the contrapositive of ``If Anne is Jean's mother, Jose is Jean's cousin'' becomes ``If Jose is not Jean's cousin, Anne is not Jean's mother.''

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Find power series representations centered at 0 for the following functions using known power series. Give the interval of convergence for the resulting series.
57. f(x)= 2x/(1+x2)2

58. f(x)= 1/ 1−x^4


59. f(x)= 3/ 3+x

60. f(x)=ln sqrt(1−x^2)


61. f(x)=ln sqrt (4−x^2)


62. f(x)=tan^−1 (4x^2)

63. Explain why or why not Determine whether the following statements are true and give an explanation or counterexample a. The interval of convergence of the power series ∑ck (x−3)^k could be (−2,8). b. The series ∑ k=0 [infinity] (−2x) k converges on the interval − 1/2

Answers

The power series representation centered at 0 for the function f(x) = 2x/(1 + x²)² is ∑ (2n + 2)xn, where n = 0 to infinity.

The interval of convergence is [-1, 1].Explanation:To get the power series representation of f(x) = 2x/(1 + x²)², we need to find the power series representations of 1/(1 + x²)² and 2x separately.The power series representation of 1/(1 + x²)² can be obtained from the power series representation of 1/(1 - x)², which is ∑(k + 1)xk. We substitute x² for x and get ∑(k + 1)x²k = ∑(2n + 2)xn, where n = 0 to infinity.Now, we find the power series representation of 2x. Since this is already in the form of a power series, we can just substitute x for x in the series. We get ∑2xn, where n = 0 to infinity. Adding these two power series, we get ∑ (2n + 2)xn, where n = 0 to infinity. The interval of convergence of this series is the intersection of the intervals of convergence of the two component series, which is [-1, 1].58. The power series representation centered at 0 for the function f(x) = 1/(1 - x⁴) is ∑xn⁴, where n = 0 to infinity. The interval of convergence is (-1, 1).Explanation:To get the power series representation of f(x) = 1/(1 - x⁴), we use the formula for the geometric series with a = 1 and r = x⁴. This gives us ∑xn⁴, where n = 0 to infinity. The interval of convergence is the set of all x for which the series converges. In this case, we have |x⁴| < 1, which means that |x| < 1. Therefore, the interval of convergence is (-1, 1).59. The power series representation centered at 0 for the function f(x) = 3/(3 + x) is ∑(-1)nxn, where n = 0 to infinity. The interval of convergence is (-3, 3).

To get the power series representation of f(x) = 3/(3 + x), we use the formula for the geometric series with a = 3 and r = -x/3. This gives us ∑(-1)nxn, where n = 0 to infinity. The interval of convergence is the set of all x for which the series converges. In this case, we have |-x/3| < 1, which means that |x| < 3. Therefore, the interval of convergence is (-3, 3).60. The power series representation centered at 0 for the function f(x) = ln √(1 - x²) is -∑(x²)ⁿ/(2n + 1), where n = 0 to infinity. The interval of convergence is [-1, 1).Explanation:To get the power series representation of f(x) = ln √(1 - x²), we use the formula for the power series of ln(1 + x), which is ∑(-1)ⁿxⁿ⁺¹/(n + 1). We substitute -x² for x and get -∑(x²)ⁿ/(n + 1), where n = 0 to infinity. Since we are looking for the power series of ln √(1 - x²), we need to divide this series by 2 to get the desired result. Therefore, the power series representation of f(x) = ln √(1 - x²) is -∑(x²)ⁿ/(2n + 1), where n = 0 to infinity. The interval of convergence is the set of all x for which the series converges. In this case, we have |x²| < 1, which means that |x| < 1. Therefore, the interval of convergence is [-1, 1).61. The power series representation centered at 0 for the function f(x) = ln √(4 - x²) is ∑(-1)ⁿxⁿ/2n, where n = 0 to infinity. The interval of convergence is (-2, 2).Explanation:To get the power series representation of f(x) = ln √(4 - x²), we use the formula for the power series of ln(1 + x), which is ∑(-1)ⁿxⁿ⁺¹/(n + 1). We substitute -x²/4 for x and get ∑(-1)ⁿ(x²/4)ⁿ⁺¹/(n + 1). Since we are looking for the power series of ln √(4 - x²), we need to multiply this series by 1/2 to get the desired result. Therefore, the power series representation of f(x) = ln √(4 - x²) is ∑(-1)ⁿxⁿ/2n, where n = 0 to infinity. The interval of convergence is the set of all x for which the series converges. In this case, we have |x| < 2, which means that the interval of convergence is (-2, 2).62. The power series representation centered at 0 for the function f(x) = tan⁻¹(4x²) is ∑(-1)ⁿ(4x²)ⁿ⁺¹/(2n + 1), where n = 0 to infinity. The interval of convergence is [-1/2, 1/2].To get the power series representation of f(x) = tan⁻¹(4x²), we use the formula for the power series of tan⁻¹(x), which is ∑(-1)ⁿxⁿ⁺¹/(2n + 1). We substitute 4x² for x and get ∑(-1)ⁿ(4x²)ⁿ⁺¹/(2n + 1), where n = 0 to infinity. The interval of convergence is the set of all x for which the series converges. In this case, we have |4x²| < 1, which means that |x| < 1/2. Therefore, the interval of convergence is [-1/2, 1/2].63. a. The interval of convergence of the power series ∑ck(x - 3)ⁿ could be (-2, 8). This is true because the interval of convergence of a power series can be any interval that contains the center of the series.b. The series ∑k=0∞(-2x)ⁿ converges on the interval (-1, 1). This is false because the series only converges if |x| < 1/2.

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The only point of inflection on the curve represented by the equation y x3 x2-3 is at:
(A) x= -2/3 (B) x 1/3 (D) x= 1/3 52.

Answers

The only point of inflection on the curve represented by the equation y = x^3 - x^2 - 3 is at x = 1/3. option (D) is the correct answer.

The second derivative of the given equation is:y''(x) = 6x - 2

We know that the inflection point is the point where the graph changes from concave upwards to concave downwards or vice versa,

therefore, the second derivative of the equation is equal to zero for the point of inflection.

The second derivative is equal to zero when:6x - 2 = 0 ⇒ x = 1/3

Therefore, the only point of inflection on the curve represented by the equation y = x^3 - x^2 - 3 is at x = 1/3.

Therefore, option (D) is the correct answer.

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5. (5 marks) A data packet crosses two different routers before reaching its destination. Assuming the delay introduced by the two routers are exponentially distributed with pdf b₁(x) = μ₁e and b

Answers

The expression for the mean of the total delay introduced by the two routers before reaching its destination is given as; μ = [1/(μ₁ + μ₂)] * [(μ₁ + μ₂y) - (1/μ₁) - (1/μ₂)] ;for 0 < x < y

The provided probability density function, which represents the delay introduced by the two routers is;b₁(x) = μ₁e ; b₂(x) = μ₂e ;

Therefore, the probability density function for the total delay is given as;

f(x) = μ₁μ₂e^(-μ₁x - μ₂(x - y))for 0 < x < y

The mean of the probability density function is given by;

μ = ∫x * f(x) dx

= ∫(x * μ₁μ₂e^(-μ₁x - μ₂(x - y))) dx

= ∫(xμ₁μ₂e^(-μ₁x - μ₂x + μ₂y)) dx

On integration, we get;μ = [1/(μ₁ + μ₂)] * [(μ₁ + μ₂y) - (1/μ₁) - (1/μ₂)] ;for 0 < x < y

Therefore, the expression for the mean of the total delay introduced by the two routers before reaching its destination is given as;

μ = [1/(μ₁ + μ₂)] * [(μ₁ + μ₂y) - (1/μ₁) - (1/μ₂)] ;for 0 < x < y

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jean is trying to prove parallelogram is a rhombus by using coordinate geometry. which statement must be true to prove is a rhombus? A) (slope of line MO)(slope of line LN) = -1
B) (slope of line MO)(slope of line LN) = 1
C) the midpoint of line MO is the midpoint of line LN
D) the distance from M to O = the distance from L to N

Answers

Jean is trying to prove a parallelogram is a rhombus by using coordinate geometry. To prove the parallelogram is a rhombus, the statement that must be true is that the distance from M to O = the distance from L to N.

Therefore, the correct option is D, that is, "the distance from M to O = the distance from L to N.

"What is a parallelogram?

A parallelogram is a quadrilateral with two pairs of parallel sides. A rhombus is a parallelogram with all four sides congruent or of equal length, which means all angles are also congruent. Therefore, all rhombi are parallelograms, but not all parallelograms are rhombi.

What is coordinate geometry?

Coordinate geometry is a branch of geometry that deals with the study of geometric figures with the help of a coordinate system. In coordinate geometry, points are assigned with coordinates (x, y) on the plane to help describe their location. You can use these coordinates to calculate slopes, distances, and other geometric properties of the points and lines formed by these points.

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please help me :( i don't understand how to do this problem
-5-(10 points) Let X be a binomial random variable with n=4 and p=0.45. Compute the following probabilities. -a-P(X=0)= -b-P(x-1)- -c-P(X=2)- -d-P(X ≤2)- -e-P(X23) - W

Answers

The probability of X = 0 for a binomial random variable with n = 4 and p = 0.45 is approximately 0.0897.

To compute the probability of X = 0 for a binomial random variable, we can use the probability mass function (PMF) formula:

[tex]P(X = k) = C(n, k) * p^k * (1 - p)^(n - k)[/tex]

Where:

- P(X = k) is the probability of X taking the value k.

- C(n, k) is the binomial coefficient, given by C(n, k) = n! / (k! * (n - k)!).

- n is the number of trials.

- p is the probability of success on each trial.

- k is the desired number of successes.

In this case, we have n = 4 and p = 0.45. We want to find P(X = 0), so k = 0. Plugging in these values, we get:

[tex]P(X = 0) = C(4, 0) * 0.45^0 * (1 - 0.45)^(4 - 0)[/tex]

The binomial coefficient C(4, 0) is equal to 1, and any number raised to the power of 0 is 1. Thus, the calculation simplifies to:

[tex]P(X = 0) = 1 * 1 * (1 - 0.45)^4P(X = 0) = 1 * 1 * 0.55^4P(X = 0) = 0.55^4[/tex]

Calculating this expression, we find:

P(X = 0) ≈ 0.0897

Therefore, the probability of X = 0 for the binomial random variable is approximately 0.0897.

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For the standard normal distribution, find the value of c such
that:
P(z > c) = 0.6454

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In order to find the value of c for which P(z > c) = 0.6454 for the standard normal distribution, we can make use of a z-table which gives us the probabilities for a range of z-values. The area under the normal distribution curve is equal to the probability.

The z-table gives the probability of a value being less than a given z-value. If we need to find the probability of a value being greater than a given z-value, we can subtract the corresponding value from 1. Hence,P(z > c) = 1 - P(z < c)We can use this formula to solve for the value of c.First, we find the z-score that corresponds to a probability of 0.6454 in the table. The closest probability we can find is 0.6452, which corresponds to a z-score of 0.39. This means that P(z < 0.39) = 0.6452.Then, we can find P(z > c) = 1 - P(z < c) = 1 - 0.6452 = 0.3548We need to find the z-score that corresponds to this probability. Looking in the z-table, we find that the closest probability we can find is 0.3547, which corresponds to a z-score of -0.39. This means that P(z > -0.39) = 0.3547.

Therefore, the value of c such that P(z > c) = 0.6454 is c = -0.39.

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Find the volume of a square pyramid with a base length of 14.2 cm and a height of 3.9 cm one point
a. 18.5 CM exponent of three
b. 71.0 CM exponent of three
c. 262.1 CM exposure to three
d. 786.4 CM exponent of three

Answers

A square pyramid is a three-dimensional object that has a square as its base. It's also characterized by the fact that each of the triangles has a common vertex. The formula for calculating the volume of a square pyramid is:V = (1/3)Bhwhere B represents the area of the base of the pyramid and h represents its height.

To calculate the volume of a square pyramid with a base length of 14.2 cm and a height of 3.9 cm, we can start by finding the area of the base, B. The area of a square is equal to its length squared, so the area of the base is: B = (14.2 cm)^2 = 201.64 cm^2Now we can substitute this value, along with the height of the pyramid, into the formula for volume:V = (1/3)BhV = (1/3)(201.64 cm^2)(3.9 cm)V = 262.12 cm^3Rounded to one decimal place, the volume of the square pyramid is 262.1 cm³.

Therefore, the correct option is c. 262.1 cm³.Note: We know that 1 cm^3 = 1 ml. So, the volume of the given square pyramid will be 262.1 ml.

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Determine whether the series is convergent or divergent by expressing sn as a telescoping sum

[infinity]
6
n2 − 1
n = 2

Answers

To determine whether the series ∑(n=2 to ∞) 6 / (n^2 - 1) is convergent or divergent, we can express the partial sums (sn) as a telescoping sum.

The telescoping sum method involves expressing each term in the series as a difference of two terms that cancel each other out when summed, leaving only a finite number of terms.

Let's express the terms of the series as a telescoping sum:

1. Write out the general term of the series:

a_n = 6 / (n^2 - 1)

2. Split the general term into two partial fractions:

a_n = 6 / [(n - 1)(n + 1)]

3. Express the general term as the difference of two terms:

a_n = (1/(n - 1)) - (1/(n + 1))

Now, let's calculate the partial sums (sn):

s_n = ∑(k=2 to n) [(1/(k - 1)) - (1/(k + 1))]

By telescoping, we can see that most terms will cancel out:

s_n = [(1/1) - (1/3)] + [(1/2) - (1/4)] + [(1/3) - (1/5)] + ... + [(1/(n-1)) - (1/(n+1))]

As we can observe, all terms cancel out except for the first and last terms:

s_n = 1 - (1/(n+1))

Now, let's analyze the behavior of the partial sums as n approaches infinity:

lim(n→∞) s_n = lim(n→∞) [1 - (1/(n+1))]

As n approaches infinity, the term 1/(n+1) approaches zero, resulting in:

lim(n→∞) s_n = 1 - 0 = 1

Since the limit of the partial sums (s_n) is a finite value (1), the series is convergent.

Therefore, the series ∑(n=2 to ∞) 6 / (n^2 - 1) is convergent.

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find the global maximum and minimum, if they exist, for the function f(x)=3ln(x)−x for all x>0.

Answers

To find the global maximum and minimum values of the function f(x)=3ln(x)−x, we have to first find its critical points and then evaluate the function at those points and also at the endpoints of its domain, which is x>0.

We can then compare those values to determine the global maximum and minimum.

Find the derivative of f(x) using the chain rule: f'(x) = (3/x) - 1For a critical point, f'(x) = 0: (3/x) - 1 = 0 ⇒ 3 = x.

So x = 3 is the only critical point in the domain x>0. We can check that this is a local maximum point by looking at the sign of the derivative on either side of x = 3:When x < 3, f'(x) is negative.

When x > 3,

f'(x) is positive.

So f(x) has a local maximum at x = 3.

To find the values of f(x) at the endpoints of the domain, we can evaluate the function at x = 0 and x = ∞:f(0) is undefined.

f(∞) = -∞.

Therefore, f(x) has no global maximum but it has a global minimum, which occurs at x = e. To show this, we can compare the values of f(x) at the critical point and the endpoint:

e ≈ 2.71828, which is the base of the natural logarithm.

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what is the 7th term of the geometric sequence where a1 = 625 and a2 = −125? (1 point) −0.2 0.2 −0.04 0.04

Answers

According to the statement the 7th term of the geometric sequence with first term 625 and common ratio -1/5 is 0.04.

The geometric sequence given by a₁ = 625 and a₂ = -125 will be given by the formula:an = a₁rⁿ⁻¹ where r is the common ratio. To find r, we can use the formula for the common ratio: r = a₂ / a₁. Thus, r = (-125) / 625 = -1 / 5.Hence, the formula of the sequence is an = 625 (-1 / 5)ⁿ⁻¹.To find the 7th term of this sequence, we can substitute n = 7 into the formula above: a₇ = 625 (-1 / 5)⁷⁻¹. In mathematics, a sequence is a series of numbers or other things in which each item is referred to as a term.

A geometric sequence is a sequence in which each term is obtained by multiplying the previous term by a fixed constant. The formula for the nth term of a geometric sequence is an = a₁rⁿ⁻¹, where a₁ is the first term, r is the common ratio, and n is the number of the term.

The problem provides us with the first two terms of the geometric sequence, a₁ = 625 and a₂ = -125. To find the common ratio, we can use the formula: r = a₂ / a₁. In this case, r = (-125) / 625 = -1 / 5.Using the formula an = a₁rⁿ⁻¹, we can find any term in the sequence. In this case, we want to find the 7th term, so we plug in n = 7 into the formula:an = 625 (-1 / 5)⁷⁻¹ = 625 (-1 / 5)⁶ = 0.04.

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Let theta be an acute angle of a right triangle. Find the values of the other five trigonometric functions of theta.

Answers

The exact values of the remaining trigonometric functions are listed below:

Case 3: cos θ = 3 / 5, tan θ = 4 / 3, cot θ = 3 / 4, sec θ = 5 / 3, csc θ = 5 / 4

Case 4: sin θ = √11 / 6, tan θ = √11 / 5, cot θ = 5√11 / 5, sec θ = 6 / 5, csc θ = 6√11 / 11

Case 5: cos θ = 8√73 / 73, sin θ = 3√73 / 73, tan θ = 3 / 8, cot θ = 8 / 3, csc θ = √73 / 3

Case 6: sin θ = 1 / 2, cos θ = √3 / 2, tan θ = √3 / 3, sec θ = 2√3 / 3, csc θ = 2

How to find the exact values of trigonometric functions

In this problem we find four cases of trigonometric functions, whose exact values of remaining trigonometric functions must be found. The trigonometric functions are defined below:

sin θ = y / √(x² + y²)

cos θ = x / √(x² + y²)

tan θ = y / x

cot θ = x / y

sec θ = √(x² + y²) / x

csc θ = √(x² + y²) / y

Now we proceed to determine the exact values of the trigonometric functions:

Case 3: y = 4, √(x² + y²) = 5

x = √(5² - 4²)

x = 3

cos θ = 3 / 5

tan θ = 4 / 3

cot θ = 3 / 4

sec θ = 5 / 3

csc θ = 5 / 4

Case 4: x = 5, √(x² + y²) = 6

y = √(6² - 5²)

y = √11

sin θ = √11 / 6

tan θ = √11 / 5

cot θ = 5√11 / 5

sec θ = 6 / 5

csc θ = 6√11 / 11

Case 5: x = 8, √(x² + y²) = √73

y = √(73 - 8²)

y = 3

cos θ = 8√73 / 73

sin θ = 3√73 / 73

tan θ = 3 / 8

cot θ = 8 / 3

csc θ = √73 / 3

Case 6: x = √3, y = 1

sin θ = 1 / 2

cos θ = √3 / 2

tan θ = √3 / 3

sec θ = 2√3 / 3

csc θ = 2

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The additional growth of plants in one week are recorded for 11 plants with a sample standard deviation of 2 inches and sample mean of 9 inches. t* at the 0.05 significance level = Ex: 1.234 Margin of error = Ex: 1.234 Confidence interval = [Ex: 12.345 Ex: 12.345] [smaller value, larger value]

Answers

The margin of error is 0.809 inches and the confidence interval is [8.19, 9.81]

The sample standard deviation is s = 2

The sample mean is x = 9

The sample size is n = 11

Significance level is α = 0.05

Degree of freedom = n - 1 = 11 - 1 = 10

The t-distribution value for 10 degrees of freedom and 0.05 level of significance is 2.228.

Here, we need to find the margin of error and confidence interval.

The formula for margin of error is:

margin of error = critical value × standard error

standard error = s/√n

standard error = 2/√11

standard error = 0.603

Critical value = t* × (standard error)

Critical value = 2.228 × (0.603)

Critical value = 1.341

Margin of error = 1.341 × 0.603

Margin of error = 0.809

The formula for confidence interval is:

Confidence interval = sample mean ± margin of error

Confidence interval = 9 ± 0.809

Confidence interval = [8.19, 9.81]

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find the area of the region bounded by the parabola y = 2x2, the tangent line to this parabola at (2, 8), and the x-axis.

Answers

The area of the region bounded by the parabola y = 2x^2, the tangent line to this parabola at (2, 8), and the x-axis can be found by calculating the definite integral between the points of intersection.

To find the area of the region, we first need to determine the points of intersection between the parabola and the x-axis. The parabola y = 2x^2 intersects the x-axis when y = 0. Setting y = 0, we can solve the equation 2x^2 = 0 to find that x = 0. Therefore, the parabola intersects the x-axis at the point (0, 0).
Next, we find the equation of the tangent line to the parabola at the point (2, 8). Taking the derivative of the parabola equation, we get dy/dx = 4x. Evaluating the derivative at x = 2, we find the slope of the tangent line is m = 4(2) = 8. Using the point-slope form of a line, we have y - 8 = 8(x - 2), which simplifies to y = 8x - 8.
To find the area of the region bounded by the parabola, the tangent line, and the x-axis, we calculate the definite integral of the absolute value of the difference between the two curves between their points of intersection. In this case, we integrate the expression |(2x^2) - (8x - 8)| between x = 0 and x = 2 to find the area of the region.

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what linear function can be represented by the set of ordered pairs? {(−4, 15), (0, 5), (4, −5), (8, −15)} enter your answer in the box. f(x)=

Answers

Answer:

  f(x) = -2.5x +5

Step-by-step explanation:

You want the linear function f(x) that is represented by the ordered pairs ...

  {(−4, 15), (0, 5), (4, −5), (8, −15)}

Slope

The slope of the line can be found using the formula ...

  m = (y2 -y1)/(x2 -x1)

  m = (5 -15)/(0 -(-4)) = -10/4 = -2.5

Intercept

The y-intercept of the line is given by the point (0, 5).

Slope-intercept form

The equation of the line in slope-intercept form is ...

  f(x) = mx +b . . . . . . . where m is the slope, and b is the y-intercept

For the values we've identified, the equation of the line is ...

  f(x) = -2.5x +5

<95141404393>

Answer fast
Marks: 6 Let x be a normally distributed random variable with a mean of 10 and a standard deviation of 3. Use the table 3 in the Appendix I, to calculate the percentage of x that lies between 11.5 and

Answers

The required percentage is 20.08%.

We know that x is normally distributed with mean `μ = 10` and standard deviation `σ = 3`.

Now, convert the given values to a standard normal distribution with a mean of `0` and a standard deviation of `1`.Z-value for `x = 11.5` is given by;`z1 = (x1 - μ)/σ = (11.5 - 10)/3 = 0.5/3 = 0.1667`

Using Table 3 in Appendix I, the area to the left of `z1 = 0.1667` is `0.5675`.Z-value for `x = ?` is given by;`z2 = (x2 - μ)/σ``(x2 - 10)/3 = z1 + A``(x2 - 10)/3 = 0.1667 + 0.5675``(x2 - 10)/3 = 0.7342``x2 - 10 = 2.2026``x2 = 12.2026`

Z-value for `x = 12.2026` is given by;`z3 = (x3 - μ)/σ = (12.2026 - 10)/3 = 0.7342`

Using Table 3 in Appendix I, the area to the left of `z3 = 0.7342` is `0.7683`.

Therefore, the percentage of `x` that lies between `11.5` and `12.2026` is given by;` percentage = (0.7683 - 0.5675) * 100``percentage = 20.08%`

Hence, the required percentage is 20.08%.

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Suppose that a recent poll found that 65% of adults believe that the overall state of moral values is poor. Complete parts (a) through ( (a) For 200 randomly selected adults, compute the mean and stan

Answers

(a) The mean of X, the number of adults who believe the overall state of moral values is poor out of 350 randomly selected adults, is approximately 231, with a standard deviation of 10.9.

(b) For every 350 adults, the mean represents the number of them that would be expected to believe that the overall state of moral values is poor. Thus, the correct option is : (B).

(c) It would not be considered unusual if 230 of the 350 adults surveyed believe that the overall state of moral values is poor.

(a) To compute the mean and standard deviation of the random variable X, we can use the formula for the mean and standard deviation of a binomial distribution.

Given:

Number of trials (n) = 350

Probability of success (p) = 0.66 (66%)

The mean of X (μ) is calculated as:

μ = n * p = 350 * 0.66 = 231 (rounded to the nearest whole number)

The standard deviation of X (σ) is calculated as:

σ = sqrt(n * p * (1 - p)) = sqrt(350 * 0.66 * 0.34) ≈ 10.9 (rounded to the nearest tenth)

(b) Interpretation of the mean:

B. For every 350 adults, the mean is the number of them that would be expected to believe that the overall state of moral values is poor. In this case, it means that out of the 350 adults surveyed, it is expected that approximately 231 of them would believe that the overall state of moral values is poor.

(c) To determine if it would be unusual for 230 of the 350 adults surveyed to believe that the overall state of moral values is poor, we need to assess the likelihood based on the distribution. Since we have the mean (μ) and standard deviation (σ), we can use the normal distribution approximation.

We can calculate the z-score using the formula:

z = (x - μ) / σ

For x = 230:

z = (230 - 231) / 10.9 ≈ -0.09

To determine if it would be unusual, we compare the z-score to a critical value. If the z-score is beyond a certain threshold (usually 2 or -2), we consider it unusual.

In this case, a z-score of -0.09 is not beyond the threshold, so it would not be considered unusual if 230 of the 350 adults surveyed believe that the overall state of moral values is poor.

The correct question should be :

Suppose that a recent poll found that 66​% of adults believe that the overall state of moral values is poor. Complete parts​ (a) through​ (c). ​

(a) For 350 randomly selected​ adults, compute the mean and standard deviation of the random variable​ X, the number of adults who believe that the overall state of moral values is poor. The mean of X is nothing.​ (Round to the nearest whole number as​ needed.) The standard deviation of X is nothing. ​(Round to the nearest tenth as​ needed.) ​

(b) Interpret the mean. Choose the correct answer below.

A. For every 231 ​adults, the mean is the maximum number of them that would be expected to believe that the overall state of moral values is poor.

B. For every 350 ​adults, the mean is the number of them that would be expected to believe that the overall state of moral values is poor.

C. For every 350​adults, the mean is the minimum number of them that would be expected to believe that the overall state of moral values is poor.

D. For every 350 ​adults, the mean is the range that would be expected to believe that the overall state of moral values is poor.

​(c) Would it be unusual if 230 of the 350 adults surveyed believe that the overall state of moral values is​ poor? No Yes

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Verify that the following function is a probability mass function, and determine the requested probabilities. f(x) = (216/43)(1/6)*, x = {1,2,3} Round your answers to four decimal places (e.g. 98.7654

Answers

The given function f(x) does not satisfy the condition of being a probability mass function (PMF) since the sum of probabilities is not equal to 1.

What method is used for the verification?

To verify that the function f(x) is a probability mass function (PMF), we need to check two conditions:

Non-Negativity: The values of f(x) must be non-negative for all possible values of x.

The sum of Probabilities: The sum of all f(x) values must be equal to 1.

Let's calculate the values of f(x) and check these conditions:

f(1) = (216/43)(1/6) = 4/43 ≈ 0.0930

f(2) = (216/43)(1/6) = 4/43 ≈ 0.0930

f(3) = (216/43)(1/6) = 4/43 ≈ 0.0930

The values of f(x) for x = 1, 2, and 3 are all non-negative, satisfying the non-negativity condition.

Now, let's check the sum of probabilities:

f(1) + f(2) + f(3) = 0.0930 + 0.0930 + 0.0930 = 0.2790

The sum of probabilities is 0.2790, which is not equal to 1.

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1 11. this table shows the input and output values for a linear function f(x). what is the difference of outputs for any two inputs that are one value apart? -15 30 15 -30

Answers

The difference of outputs for any two inputs that are one value apart in the given linear function is 15.

A linear function represents a straight line on a graph and can be expressed in the form of f(x) = mx + b, where m is the slope and b is the y-intercept. In this case, we are given a table of input and output values for the linear function f(x). By examining the given values, we can observe that for any two inputs that are one value apart, the outputs differ by 15.

Let's consider the given input and output values: -15, 30, 15, -30. We can calculate the difference of outputs for inputs that are one value apart.

For input -15, the corresponding output is 30.

For input 15, the corresponding output is -30.

The difference between the outputs (-30 - 30) is -60. However, since we are interested in the absolute difference, we take the absolute value of -60, which is 60.

Hence, the difference of outputs for any two inputs that are one value apart in this linear function is 15 (the absolute value of -60). This indicates that for every increase of one unit in the input, the output decreases by 15, demonstrating a constant rate of change in the linear function.

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Answer the following: 1. What is your comprehension of the problem? 2. Why is your proposed method of solution suitable for the problem? 3. Provide snapshots showing the solution, how the problem is s

Answers

1. The problem involves calculating the Value at Risk (VaR) of an investment at a specific risk level (1-a).

2. In order to solve for VaR numerically, a root-finding formulation is proposed. By finding the root of this function, we can determine the value of z that satisfies the equation and represents the VaR at the desired risk level.

How to explain the information

1. The VaR is calculated at a specific risk level, which is the probability that the loss will occur. For example, a VaR of 99% means that there is a 1% chance that the investment will lose more than the VaR value.

2. The proposed method of solution is suitable for the problem because it is a general method that can be used to calculate the VaR of any investment. The method is also relatively simple to implement and can be used with a variety of software packages

In addition, the proposed method is accurate and can be used to calculate the VaR with a high degree of precision. This is important because the VaR is a measure of risk and any errors in the calculation of the VaR can lead to incorrect decisions about the investment.

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Continuous profit and loss (p(x), where p(x) has positive values and negative values) at a specific risk level (1-a) is a measure of the investment's risk of loss at that particular risk level. As an illustration, if a=0.99, the investment's actual losses must not exceed VaR (0.99) more than once. per 100 days.

It is possible to solve the integral numerically and as accurately as necessary. VaR is a metric for assessing financial risk that is highly dependent on the assumptions made about the distribution of expected profits and losses. For example, consider two investment models with same mean  

1. What is your comprehension of the problem?

2. Why is your proposed method of solution suitable for the problem?

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(round your answer to the nearest whole value) .Use the Chain Rule to find the indicated partial derivatives.z = x^2 + xy^3, x=uv^3+w^2, y=u+ve^wz/ u, z/ v, u/ w when u=2, v=2, w=0 Alex, Drake, and Sam are the only buyers in the market for a private good. Answer the following questions based on the MC and MWTP functions given below. = 25 + 0.25MWTPA = 100 QMWTPB = 210 2.1QMWTPC = 240 2.4QWhat is the aggregate marginal willingness-to-pay equation? Leave 3 decimal places in all values.Show the aggregate MWTP and MC functions in the same graph. Find the socially efficient price and quantity and show these in your graph. Round price to 2 decimal places. Round quantity to a whole number.If the socially efficient quantity was exchanged in this market, what would be the net value? Use price rounded to 2 decimals and quantity rounded to a whole number to find net value. which statements is false about viruses that make us sick? the remove filter command on the advanced menu clears all filters. true or false Which of the following characteristics of a car would be considered a nominal variable? Brand of Tires Mileage Number of Passengers Volume of Gas in the Tank 1 The PEP transmitted by an ACSSB system is 100 W. It uses anNE571N compandor LIC. Calculate the power transmitted under theno-modulation condition. The audio signal ranges from -20 dBm to+25 dBm b The effort to deal with religious differences constructively is the practice ofA. non-religious theologyB. religious pluralismC. religious freedomD. religious constructivism 1.A market segment does not have to be measurable if it is substantial enough. True or False2.Positioning should be based on a companys segmentation strategy. True or False3.An individual who purchases products in bulk to be sold to end users could be considered a retailer. True or False4. Branding identifies the producer of a product or the provider of a service. True or False The values listed below are waiting times (in minutes) of customers at two different banks. At Bank A, customers enter a single waiting line that feeds three teller windows. At Bank B, customers may enter any one of three different lines that have formed at three teller windows. Answer the following questions Bank A 6.4 6.8 71 7.2 7.5 7.8 7.8 7.8 66 54 67 5.7 Bank B 4.2 6.2 67 77 77 8.5 9.2 10.0 Click the icon to view the table of Chi-Square critical values www Construct a 95% confidence interval for the population standard deviation o at Bank A. min services provided for cash and credit. abc company provides $8,000 of programming services for customers. the company receives cash of $4,500 from customers, and it bills the balance of $3,500 on account. A. Identify the general ledger accounts affected B. Prepare the journal entry