what would the radiusof a hemisphere be if the volume is 140000pi

Answers

Answer 1

Answer: [tex]10\sqrt[3]{210}[/tex] units, (about 59.4)

Step-by-step explanation:

a hemisphere is half a sphere.

the volume of a sphere is [tex]\frac{4}{3} \pi r^3[/tex]

since we need half of this, the volume of a hemisphere would be: [tex]\frac{4}{6} \pi r^3[/tex]

this simplified nicely to: [tex]\frac{2}{3} \pi r^3[/tex]

next, we want to find the radius, given the volume. So lets set up the equation.

[tex]140000\pi = \frac{2}{3} \pi r^3[/tex]

[tex]140000 = \frac{2}{3} r^3[/tex]    --- cancel a pi from both sides.

[tex]210000 = r^3[/tex] ---- multiply both sides by 3/2 to cancel the 2/3.

[tex]\sqrt[3]{210000 }= r[/tex] ---- take the cube root of both sides to find r

[tex]10\sqrt[3]{210} = r[/tex]

Thats the exact answer: the radius is [tex]10\sqrt[3]{210}[/tex] units.

a decimal approximation is about 59.4 units.


Related Questions

A certain flight arrives on time 88 percent of the time. Suppose 145 flights are randomly selected. Use the normal approximation to the binomial to approximate the probability that​(a) exactly 128 flights are on time.​(b) at least 128 flights are on time.​(c) fewer than 124 flights are on time.​(d) between 124 and 125​, inclusive are on time.​(Round to four decimal places as​ needed.)

Answers

The probability that between 124 and 125​, inclusive are on time is approximately 0.0655.

Given:

The probability of a flight arriving on time is 0.88

Number of flights selected randomly = 145

Let X be the number of flights arriving on time.

(a) P(exactly 128 flights are on time)

Using the normal approximation to the binomial distribution, we have:

Mean, µ = np = 145 × 0.88 = 127.6

Standard deviation, σ = sqrt(np(1-p)) = sqrt(145 × 0.88 × 0.12) = 3.238

P(X = 128) can be approximated using the standard normal distribution:

z = (128 - µ) / σ = (128 - 127.6) / 3.238 = 0.1234

P(X = 128) ≈ P(z = 0.1234) = 0.4511

Therefore, the probability that exactly 128 flights are on time is approximately 0.4511.

(b) P(at least 128 flights are on time)

P(X ≥ 128) can be approximated as:

z = (128 - µ) / σ = (128 - 127.6) / 3.238 = 0.1234

P(X ≥ 128) ≈ P(z ≥ 0.1234) = 0.4515

Therefore, the probability that at least 128 flights are on time is approximately 0.4515.

(c) P(fewer than 124 flights are on time)

P(X < 124) can be approximated as:

z = (124 - µ) / σ = (124 - 127.6) / 3.238 = -1.1154

P(X < 124) ≈ P(z < -1.1154) = 0.1326

Therefore, the probability that fewer than 124 flights are on time is approximately 0.1326.

(d) P(between 124 and 125​, inclusive are on time)

P(124 ≤ X ≤ 125) can be approximated as:

z1 = (124 - µ) / σ = (124 - 127.6) / 3.238 = -1.1154

z2 = (125 - µ) / σ = (125 - 127.6) / 3.238 = -0.7388

P(124 ≤ X ≤ 125) ≈ P(-1.1154 ≤ z ≤ -0.7388) = P(z ≤ -0.7388) - P(z < -1.1154)

P(124 ≤ X ≤ 125) ≈ 0.1981 - 0.1326 = 0.0655

Therefore, the probability that between 124 and 125​, inclusive are on time is approximately 0.0655.

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Which statement is TRUE?
4
4
A A characteristic of a population is called a statistic
B A population is randomly selected from a sample group
C A sample includes all of the individuals or units of the group
D A random sample may represent the population

Answers

Answer:

The answer is D.) A random sample may represent the population.

Step-by-step explanation:

Collecting samples from anyone at random increases the chances of representing the overall people because that's where they're getting it from. But there is still a chance it will not represent everyone or the general population.

Answer:B) A random sample may represent the population is your best answer.

Step-by-step explanation:

this is what i got for this one. have a good day everyone. :)

mean of 3 8 6 8 5 6 bc like i need help so please help me teaqchers

Answers

Mean- 6

Median- 6

Mode- 6 and 8

What is the interval of decrease/increase of f(x)=-x^2-2x+3

Answers

The intervals over which  it is increasing or decreasing is:

Increasing on: ([tex]-\infty[/tex], -1)

Decreasing on: (-1, [tex]\infty[/tex])

Intervals of increase and decrease:

The definitions for increasing and decreasing intervals are given below.

For a real-valued function f(x), the interval I is said to be an increasing interval if for every x < y, we have f(x) ≤ f(y).For a real-valued function f(x), the interval I is said to be a decreasing interval if for every x < y, we have f(x) ≥ f(y).

The function is :

[tex]f(x)=-x^2-2x+3[/tex]

We have to find the interval of function is decrease/increase .

Now, We have to first differentiate with respect to x , then:

f'(x) = - 2x + 2

This derivative is never 0 for real x.

In order to determine the intervals over which  it is increasing or decreasing.

Increasing on: ([tex]-\infty[/tex], -1)

Decreasing on: (-1, [tex]\infty[/tex])

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An arch is in the shape of a parabola. It has a span of 280 meters and a maximum height of 28 meters.

Find the equation of the parabola.

Determine the distance from the center at which the height is 13 meters.​

Answers

The equation of the parabola is given as follows:

y = -28/19600(x - 140)² + 28.

The distances from the center for a height of 13 meters are given as follows:

37.53 m and 242.47 m.

How to obtain the equation of the parabola?

The equation of a parabola of vertex (h,k) is given by the equation presented as follows:

y = a(x - h)² + k.

In which a is the leading coefficient.

It has a span of 280 meters, hence the x-coordinate of the vertex is given as follows:

x = 280/2

x = 140 -> h = 140.

The maximum height is of 28 meters, hence the y-coordinate of the vertex is given as follows:

y = 28 -> k = 28.

Hence the equation is:

y = a(x - 140)² + 28.

When x = 0, y = 0, hence the leading coefficient a is obtained as follows:

19600a = -28

a = -28/19600

Hence:

y = -28/19600(x - 140)² + 28.

The distance from the center at which the height is 13 meters is obtained as follows:

13 = -28/19600(x - 140)² + 28.

28/19600(x - 140)² = 15

(x - 140)² = 15 x 19600/28

(x - 140)² = 10500.

Hence the distances are obtained as follows:

x - 140 = -sqrt(10500) -> x = -sqrt(10500) + 140 = 37.53 m.x - 140 = sqrt(10500) -> x = sqrt(10500) + 140 = 242.47 m.

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In a random sample of 18 residents of the state of Montana, the mean waste recycled per person per day was 2.1 pounds with a standard deviation of 0.74 pounds. Determine the 80% confidence interval for the mean waste recycled per person per day for the population of Montana. Assume the population is approximately normal.
Construct the 80% confidence interval. Round to one decimal
Lower endpoint: ??
Upper endpoint: ??

Answers

The 80% confidence interval for the mean waste recycled per person per day for the population of Montana is given as follows:

(1.9, 2.3).

What is a t-distribution confidence interval?

The t-distribution is used when the standard deviation for the population is not known, and the bounds of the confidence interval are given according to the following rule:

[tex]\overline{x} \pm t\frac{s}{\sqrt{n}}[/tex]

In which the variables of the equation are presented as follows:

[tex]\overline{x}[/tex] is the sample mean.t is the critical value.n is the sample size.s is the standard deviation for the sample.

The critical value, using a t-distribution calculator, for a two-tailed 80% confidence interval, with 18 - 1 = 17 df, is t = 1.33.

The parameters are given as follows:

[tex]\overline{x} = 2.1, s = 0.74, n = 18[/tex]

The lower bound of the interval is given as follows:

2.1 - 1.33 x 0.74/sqrt(18) = 1.9.

The upper bound of the interval is given as follows:

2.1 + 1.33 x 0.74/sqrt(18) = 2.3.

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The plane passing through the point P(1,3,4) with normal vector 2i+63 +7k has equation x+3y+4z=48 · Answer Ο Α True O B False

Answers

The equation of the plane passing through point P with normal vector 2i + 6j + 7k is x + 3y + 4z = 48.

A: True.

The equation of a plane in 3D space is given by Ax + By + Cz = D, where A, B, C are the components of the normal vector and D is the distance from the origin to the plane along the direction of the normal vector.

In this case, the normal vector is 2i + 6j + 7k, so A = 2, B = 6, and C = 7. To find D, we can substitute the coordinates of the given point P into the equation of the plane:

2(1) + 6(3) + 7(4) = D

2 + 18 + 28 = D

D = 48

Therefore, the equation of the plane passing through point P with normal vector 2i + 6j + 7k is x + 3y + 4z = 48.

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Use the discriminant to determine the number of real solutions for each quadratic equation. Do not solve.

Answers

a) The quadratic equation x² + 7x + 10 = 0 has two distinct real roots
b) The quadratic equation 4x² - 3x + 4 = 0 has two complex (non-real) roots.

The discriminant of a quadratic equation of the form ax² + bx + c = 0 is given by the expression b² - 4ac. The value of the discriminant can help us determine the nature of the roots of the quadratic equation.

Specifically:

If the discriminant is positive, then the quadratic equation has two distinct real roots.

If the discriminant is zero, then the quadratic equation has one real root (also known as a double root or a repeated root).

If the discriminant is negative, then the quadratic equation has two complex (non-real) roots.

Using this information, we can determine the number of real solutions for each of the given quadratic equations without actually solving them:\

a) x² + 7x + 10 = 0

Here, a = 1, b = 7, and c = 10.

Therefore, the discriminant is:

b² - 4ac = 7² - 4(1)(10) = 49 - 40 = 9

Since the discriminant is positive, this quadratic equation has two distinct real roots.

b) 4x² - 3x + 4 = 0

Here, a = 4, b = -3, and c = 4.

Therefore, the discriminant is:

b² - 4ac = (-3)² - 4(4)(4) = 9 - 64 = -55

Since the discriminant is negative, this quadratic equation has two complex (non-real) roots.

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Q2Multiply (10101) by (10011) in GF(2^5), with (x^5 + x^4 + x^3 + x^2+ 1) as the modulus. Show important intermediate steps.

Answers

We have shown that (10101) times (10011) in GF(2^5) with [tex](x^5 + x^4 + x^3 + x^2+ 1)[/tex] as the modulus is equal to (101111) in binary or [tex]x^4 + x^2 + x + 1[/tex] in polynomial form.

To multiply (10101) by (10011) in GF [tex](2^5)[/tex] with [tex](x^5 + x^4 + x^3 + x^2+ 1)[/tex] as the modulus, we first need to write these polynomials as binary numbers:

[tex](10101) = 1x^4 + 0x^3 + 1x^2 + 0x + 1 = 16 + 4 + 1 = (21)_10 = (10101)_2[/tex]

[tex](10011) = 1x^4 + 0x^3 + 0x^2 + 1x + 1 = 16 + 2 + 1 = (19)_10 = (10011)_2[/tex]

We will use long multiplication to multiply these polynomials in GF[tex](2^5)[/tex], as shown below:

    1 0 1 0 1   <-- (10101)

  x 1 0 0 1 1   <-- (10011)

  ------------

    1 0 1 0 1   <-- Step 1: Multiply by 1

1 0 1 0 1      <-- Step 2: Multiply by x and shift left

------------

1 0 0 1 0 1    <-- Step 3: Add steps 1 and 2

1 0 0 1 0 <-- Step 4: Multiply by x and shift left

1 0 1 1 1 1 <-- Step 5: Add steps 3 and 4

Now, we have the product (101111)_2, which corresponds to the polynomial [tex]1x^4 + 0x^3 + 1x^2 + 1x + 1 = x^4 + x^2 + x + 1[/tex] in GF[tex](2^5)[/tex] with [tex](x^5 + x^4 + x^3 + x^2+ 1)[/tex] as the modulus. We can verify that this polynomial is indeed in GF(2^5) with modulus [tex](x^5 + x^4 + x^3 + x^2+ 1)[/tex] by noting that all of its coefficients are either 0 or 1, and none of its terms have degree greater than 4. Additionally, we can check that it satisfies the modulus:

[tex]x^4 + x^2 + x + 1 = (x^4 + x^3 + x^2 + x) + (x^3 + 1)[/tex]

[tex]= x(x^3 + x^2 + x + 1) + (x^3 + 1)[/tex]

[tex]= x(x^3 + x^2 + x + 1) + (x^3 + x^2 + x + 1)[/tex]

(since [tex]x^3 + x^2 + x + 1 = 0[/tex] in GF[tex](2^5))[/tex]

[tex]= (x+1)(x^3 + x^2 + x + 1)[/tex]

Therefore, we have shown that (10101) times (10011) in GF(2^5) with [tex](x^5 + x^4 + x^3 + x^2+ 1)[/tex] as the modulus is equal to (101111) in binary or [tex]x^4 + x^2 + x + 1[/tex] in polynomial form.

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PLS HELP ME FAST I NEED IT FOR A TEST

Answers

The surface area of the triangular base prism is 174 ft².

How to find the surface area of the prism?

The prism above is a triangular prism. Therefore, let's find the surface area of the triangular prism as follows:

The prism has two triangular faces and three rectangular faces.

Therefore,

area of the triangle = 1 / 2 bh

where

b = baseh = height

Therefore,

area of the triangle = 1 / 2 × 6 × 4

area of the triangle = 24 / 2

area of the triangle = 12 ft²

Therefore,

area of the rectangle = l × w

where

l = lengthw = width

Hence,

area of the rectangle =  8 × 5 = 50 ft²

Surface area of the triangular prism = 12(2) + 3(50)

Surface area of the triangular prism = 24 + 150

Surface area of the triangular prism = 174 ft²

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The values in the table represent Function A and Function B.

Image_8695

Which statement about the 2
functions is true?

Answers

The statement that is true about the 2 functions, in which the relationship between the x and y-values in the table of values for both functions is a linear relationship is that The y-intercept of the graph of A is equal to the y-intercept of the graph of B

How to explain the function

The equation representing the relationship in function A in point-slope form is therefore;

y - 12 = 6·(x - 2)

y - 12 = 6·x - 12

y = 6·x - 12 + 12 = 6·x

The equation in slope-intercept form, y = m·x + c, where c is the y-intercept is therefore; y = 6·x

The true statement is therefore; The y-intercept of the graph of A is less than the y-intercept of the graph of B

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If n = 25, 4 = 20%, M = 10%, and s = 15%,
Use the drop-down menus to complete this sentence that reports the results. (Note: 'XXX' is put in place of the actual numbers so as to not give away what the correct values are for the previous
questions.)
There [8a. Select] a significant reduction in peoples over estimation of the line length, [8b. Select], p [8c. Select], with [8d. Select]
8a.
A. was
B. was not
8b.
A. t(df) = XXX
B. t = XXX with df = XXX
C. t-test with df = XXX
D. M = 10%
8c.
A. < 0.01 two-tailed
B. > 0.01 two-tailed
C. = 0.01
8d.
A. Cohen's d = XXX, M = 10%, 95% CI [XXX, XXX].
B. M = 10%, n = 25, s = 15%.
C. M = 10%, n = 25, s = 15%, Cohen's d = XXX , M = 10%, 95% CI [XXX, XXX].
D. the t-test showing that people did do better after training.

Answers

There was a significant reduction in peoples over estimation of the line length, t = XXX with df = XXX, p < 0.01 two-tailed, with M = 10%, n = 25, s = 15%, Cohen's d = XXX , M = 10%, 95% CI [XXX, XXX].

8a. A. was
8b. B. t = XXX with df = XXX
8c. A. < 0.01 two-tailed
8d. C. M = 10%, n = 25, s = 15%, Cohen's d = XXX , M = 10%, 95% CI [XXX, XXX].

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12) Find the compound interest for the situation. Use the compound interest formula. Round answer to the nearest hundredth. Include appropriate unit in final answers. Use a calculator if needed.

Cameron borrowed $18,000 at 10% interest for 4 years. How much in interest did he pay?

Find the total amount paid.

Answers

Answer:

$7200

step by step Explanation:

Cameron borrowed $18,000 at an interest rate of 10% for a period of 4 years. To calculate the interest, we can use the simple interest formula: I = P * r * t, where I is the interest, P is the principal amount, r is the interest rate, and t is the time period.

Plugging in the values, we get I = 18,000 * 0.10 * 4 = $7,200. Therefore, Cameron paid a total of $7,200 in interest over the 4-year period.

"price by mathematical induction
Prove that n! > 2^n for all n ∈ Z≥4"

Answers

By the principle of mathematical induction, we can conclude that n! > 2ⁿ for all n ∈ Z≥4.

What is mathematical induction?

The art of demonstrating a claim, theorem, or formula that is regarded as true for each and every natural number n is known as proof.

We can prove by mathematical induction that n! > 2ⁿ for all n ∈ Z≥4.

First, we will prove the base case n = 4:

4! = 4 x 3 x 2 x 1 = 24

2⁴ = 16

Since 24 > 16, the base case is true.

Next, we assume that the inequality is true for some arbitrary k ≥ 4:

k! > [tex]2^k[/tex]

To complete the induction step, we must prove that the inequality is also true for k + 1:

(k+1)! = (k+1) x k!

(k+1)! > (k+1) x [tex]2^k[/tex]    (by the induction hypothesis)

(k+1)! > 2 x [tex]2^k[/tex]

(k+1)! > [tex]2^{(k+1)[/tex]

Since the inequality is true for k+1, this completes the induction step.

Therefore, by the principle of mathematical induction, we can conclude that n! > 2ⁿ for all n ∈ Z≥4.

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You invest $2,000 for 3 years at interest rate 6%, compounded every 6 months. What is the value of your investment at the end of the period?

Answers

If you invest $2,000 for 3 years at an interest rate of 6%, compounded every 6 months. The value of your investment at the end of the period is $2,397.39.

The interest rate is 6% and it is compounded every 6 months, so the period is 6 months. To calculate the value of the investment at the end of the period, we need to use the formula for compound interest:

A = P(1 + r/n)^(nt)

Where:
A = the final amount.
P = the principal amount (initial investment)
r = the annual interest rate (6%).
n = the number of times the interest is compounded per year (2, since it's compounded every 6 months).
t = the time period in years (3)

Plugging in the numbers, we get:

A = 2,000(1 + 0.06/2)^(2*3)
A = 2,000(1 + 0.03)^6
A = 2,000(1.03)^6
A = $2,397.39

Therefore, the value of your investment at the end of the period is $2,397.39.

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How many functions are there from A = {1, 2, 3} to B = {a, b, c,d}? Briefly explain your answer.

Answers

There are 64 functions from set A to set B.

To determine how many functions there are from A = {1, 2, 3} to B = {a, b, c, d}, you can use the following step-by-step explanation:

1. Understand that a function maps each element of set A to exactly one element in set B.
2. Notice that set A has 3 elements, and set B has 4 elements.
3. For each element in set A, there are 4 choices in set B it can be mapped to.
4. Therefore, the total number of functions is equal to the product of the number of choices for each element in set A, which is 4 × 4 × 4 = 64.

So, there are 64 functions from A = {1, 2, 3} to B = {a, b, c, d}.

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Solve 14 - 3m = 4m
m =

Answers

Answer:

The answer is m = 2 .

Step-by-step explanation:

14 - 3m = 4m

14 = 4m + 3m

14 = 7m

14/7 = m

2 = m

m = 2

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To solve for "m", we need to isolate the variable on one side of the equation.

We can start by moving the "3m" term to the right side of the equation by adding it to both sides:

14 - 3m + 3m = 4m + 3m

Simplifying the left side of the equation, we get:

14 = 7m

Finally, we can isolate "m" by dividing both sides of the equation by 7:

14 ÷ 7 = 7m ÷ 7

2 = m

Therefore, the solution to the equation 14 - 3m = 4m is m = 2.

Solve each of the following by Laplace Transform: 1. day + 2 dy + y = sinh3t - 5cosh3t; y(0) = -2, y'(0) = 5 = dt
2 Solve each of the following by Laplace Transform: 2. day dt2 - 4 - 5y = e =3+ sin(4t)

Answers

The solution to the differential equation is y(t) = 3cosh(3t) + 2sin(4t).

To solve this differential equation using Laplace transform, we first apply the transform to both sides of the equation:

L[day + 2dy/dt + y] = L[sinh(3t) - 5cosh(3t)]

Using the properties of Laplace transform and the derivative property, we get:

sY(s) - y(0) + 2[sY(s) - y(0)]/dt + Y(s) = 3/(s^2 - 9) - 5s/(s^2 - 9)

Substituting the initial conditions y(0) = -2 and y'(0) = 5, and simplifying the expression, we get:

Y(s) = (3s - 19)/(s^3 - 2s^2 - 3s + 18)

Now, we need to find the inverse Laplace transform of Y(s) to obtain the solution y(t). This can be done using partial fraction decomposition, which gives:

Y(s) = -1/(s - 3) + 4/(s + 2) + 2/(s - 3)^2

Taking the inverse Laplace transform of each term using the Laplace transform table, we get:

y(t) = -e^(3t) + 4e^(-2t) + 2te^(3t)

Therefore, the solution to the differential equation is y(t) = -e^(3t) + 4e^(-2t) + 2te^(3t).

To solve this differential equation using Laplace transform, we first apply the transform to both sides of the equation:

L[day/dt^2 - 4y - 5y] = L[e^3 + sin(4t)]

Using the properties of Laplace transform, we get:

s^2Y(s) - sy(0) - y'(0) - 4Y(s) - 5Y(s) = 3/(s - 3) + 4/(s^2 + 16)

Substituting the initial conditions y(0) = 0 and y'(0) = 0, and simplifying the expression, we get:

s^2Y(s) - 9Y(s) = 3/(s - 3) + 4/(s^2 + 16)

Using partial fraction decomposition, we get:

Y(s) = (3s - 9)/(s^2 - 9) + (4s)/(s^2 + 16)

Taking the inverse Laplace transform of each term using the Laplace transform table, we get:

y(t) = 3cosh(3t) + 2sin(4t)

Therefore, the solution to the differential equation is y(t) = 3cosh(3t) + 2sin(4t).

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You are legally allowed to contribute up to $19,500 (or $1625/mo) to your 401(k). Your company will match up to 6%. It’s time to fill out question 1 on your 401(k) form. Complete below, making sure to consider the rest of your monthly budget from up above:

Answers

For question 1 on my 401(k) form, I would like to contribute 6% of my salary, which is $300 per month. Since my company will match up to 6%, this means that I will receive an additional $300 per month in employer contributions. This brings my total monthly contribution to $600. I have considered my monthly budget and determined that I can afford to contribute this amount without compromising my other financial obligations.

Question 1: Binomial distribution We are testing the landing performance of a new automated drone. The drone lands on the targeted area 80% of the time. We test the drone 12 times. Let X be the number of landings out of the targeted are.
a. Explain why the X is a binomial random variable and provide its characteristics.
b. What is the probability that the drone will land out of the targeted area exactly 4 times?
c. What is the probability that the drone will land out of the targeted area at most 4 times?
d. What is the expected value of X?
e. Explain the meaning of the expected value in the context of the story
f. What is the variance of X?
g. Given that drone missed the landing targeted area at most 4 times, what is the probability that it missed the target at most 2 times?
h. Given that drone missed the landing targeted area at most 4 times, what is the probability that it missed the target at least 2 times?
i. What is probability that X is within three standard deviations of the mean

Answers

a) The probability that X is within three standard deviations of the mean is approximately 1.

b) the probability that the drone will land out of the targeted area exactly 4 times is 0.00052.

c) The probability that the drone will land out of the targeted area at most 4 times is 0.1029

d) The expected value of X is 9.6.

e) The meaning of the expected value in the context of the story is average landing performance of the drone based on the given probability of success.

f) The variance of X is 0.7319.

g) The probability that it missed the target at most 2 times is 3.121.

h) The probability that it missed the target at least 2 times is 0.7319.

I) The probability that X is within three standard deviations of the mean is 1.3856.

The Binomial Distribution:

The binomial distribution is a discrete probability distribution that describes the number of successes in a fixed number of independent trials with a constant probability of success.

The characteristics of a binomial random variable include the number of trials (n), the probability of success (p), the number of successes (x), and the mean and variance of the distribution.

Here we have

Binomial distribution We are testing the landing performance of a new automated drone. The drone lands on the targeted area 80% of the time. We test the drone 12 times.

a. X is a binomial random variable because we have a fixed number of independent trials and each landing has only two possible outcomes (landing on the targeted area or landing outside of it) with a constant probability of success (0.8).

The characteristics of the binomial distribution are:

The number of trials is fixed (n=12)

Each trial has only two possible outcomes (success or failure)

The probability of success (p) is constant for each trial

The trials are independent of each other

b. P(X = 4) = (12 choose 4) × (0.8)⁴ × (0.2)⁸ = 0.00052

c. P(X< = 4) = P(X = 0) + P(X = 1) + P(X = 2) + P(X = 3) + P(X = 4)

= 0.0687 + 0.2060 + 0.3020 + 0.2670 + 0.1854 = 0.1029

d. E(X) = np = 120.8 = 9.6

e. The expected value of X represents the average number of successful landings (in the targeted area) we would expect to see in a sample of 12 landings.

In the context of the story, it tells us the average landing performance of the drone based on the given probability of success.

f. Var(X) = np(1-p) = 120.80.2 = 1.92

g. P(X<=2 | X<=4) = P(X<=2)/P(X<=4)

= (P(X=0) + P(X=1) + P(X=2))/(P(X=0) + P(X=1) + P(X=2) + P(X=3) + P(X=4))

= 0.3217/0.1029 = 3.121

h. P(X>=2 | X<=4) = 1 - P(X<2 | X<=4) = 1 - P(X<=1 | X<=4) = 1 - (P(X=0) + P(X=1))/(P(X=0) + P(X=1) + P(X=2) + P(X=3) + P(X=4)) = 1 - 0.2747/0.1029 = 0.7319

i. The standard deviation of a binomial distribution is √(np(1-p)). So, the standard deviation of X is √(120.80.2) = 1.3856. Three standard deviations above and below the mean would be 3*1.3856 = 4.1568.

Therefore,

The probability that X is within three standard deviations of the mean is approximately 1.

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Lisa is on a run of 18 miles. She has 3 hours to complete her run. How many miles does she need to run each hour to complete the run?

A) 7
B) 6
C) 8
D) 5

Answers

Answer:

B) 6

Step-by-step explanation:

Firstly, we need to know what the question is asking for.

"How many miles does she need to run each hour to complete the run" is asking for a speed in miles per hour.

miles / hour = speed in mph

18 miles / 3 hours = 18/3 mph

18/3 simplifies to 6

Lisa needs to run 6 mph

The numbers of attendees at the carnival over the last 15 days are 50, 200, 175, 125, 75, 100, 150, 225, 250, 100, 125, 75, 25, 225, and 175. identify the box-and-whisker plot for the data.

Answers

Answer:

Its the first one

Step-by-step explanation:

correct answer

use synthetic division to show that x is a solution of the third-degree polynomial equation and use the result to factor the polynomial completely list all the real solutions of the equation

Answers

To begin, let's recall that synthetic division is a method used to divide a polynomial by a linear factor (i.e. a binomial of the form x-a, where a is a constant). The result of synthetic division is the quotient of the division, which is a polynomial of one degree less than the original polynomial.

In this case, we are given that x is a solution of a third-degree polynomial equation. This means that the polynomial can be factored as (x-r)(ax^2+bx+c), where r is the given solution and a, b, and c are constants that we need to determine.

To use synthetic division, we will divide the polynomial by x-r, where r is the given solution. The result of the division will give us the coefficients of the quadratic factor ax^2+bx+c.

Here's an example of how to do this using synthetic division:

Suppose we are given the polynomial P(x) = x^3 + 2x^2 - 5x - 6 and we know that x=2 is a solution.

1. Write the polynomial in descending order of powers of x:

P(x) = x^3 + 2x^2 - 5x - 6

2. Set up the synthetic division table with the given solution r=2:

2 | 1  2  -5  -6

3. Bring down the leading coefficient:

2 | 1  2  -5  -6
  ---
   1

4. Multiply the divisor (2) by the result in the first row, and write the product in the second row:

2 | 1  2  -5  -6
  ---
   1  2

5. Add the second row to the next coefficient in the first row, and write the sum in the third row:

2 | 1  2  -5  -6
  ---
   1  2 -3

6. Multiply the divisor by the result in the third row, and write the product in the fourth row:

2 | 1  2  -5  -6
  ---
   1  2 -3
       4

7. Add the fourth row to the next coefficient in the first row, and write the sum in the fifth row:

2 | 1  2  -5  -6
  ---
   1  2 -3
       4 -2

The final row gives us the coefficients of the quadratic factor: ax^2+bx+c = x^2 + 2x - 3. Therefore, the factorization of P(x) is

P(x) = (x-2)(x^2+2x-3).

To find the real solutions of the equation, we can use the quadratic formula or factor the quadratic further:

x^2 + 2x - 3 = (x+3)(x-1).

Therefore, the real solutions of the equation are x=2, x=-3, and x=1.

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Let a, b, c be positive natural numbers. Determine whether the following statement is true or false: If u > x and v > y then ged(u, v) > ged(x,y). O True O False

Answers

The statement is true, if u > x and v > y then ged(u, v) > ged(x,y).

First, let's define ged(u,v) as the greatest common divisor of u and v.

Assuming that u > x and v > y, we can express u and v as:

u = x + m
v = y + n

where m and n are positive natural numbers.

Now, let's assume that ged(x,y) = d, where d is a positive natural number that divides both x and y.

Therefore, we can express x and y as:

x = dp
y = dq

where p and q are positive natural numbers.

Now, we can express u and v in terms of d as well:

u = dp + m
v = dq + n

Since m and n are positive natural numbers, it follows that ged(u,v) is a positive natural number as well.

Now, we need to show that ged(u,v) > d.

Assume the contrary, i.e. ged(u,v) ≤ d.

This means that there exists a positive natural number k that divides both u and v, and k ≤ d.

Since k divides both u and v, it must also divide their difference:

u - v = (d * p + m) - (d * q + n) = d * (p - q) + (m - n)

Therefore, k must also divide (m - n).

But since m and n are positive natural numbers, we have:

|m - n| < max(m,n) ≤ max(u,v)

Therefore, k cannot divide both (m - n) and max(u,v), which contradicts the assumption that k divides both u and v.

Therefore, our initial assumption that ged(u,v) ≤ d must be false, which means that ged(u,v) > d.

Therefore, the statement is true.

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Suppose that a recent issue of a magazine reported that the average weekly earnings for workers who have not received a high school diploma is $492. Suppose you would like to determine if the average weekly for workers who have received a high school diploma is significantly greater than average weekly earnings for workers who have not received a high school diploma. Data providing the weekly pay for a sample of 50 workers are available in the file named WeeklyHSGradPay. These data are consistent with the findings reported in the article.
Weekly Pay
687.73 543.15 789.45 442.26 684.85 661.43 478.3 629.62 486.95 786.47
652.15 652.82 669.81 641.13 577.24 845.68 541.59 553.36 743.25 468.61
821.71 757.82 657.34 506.95 744.93 553.2 827.92 663.85 685.9 637.25
530.54 515.85 588.77 506.62 720.84 503.01 583.18 7,980.24 465.55 593.12
605.33 701.56 491.86 763.4 711.19 631.73 605.89 828.37 477.81 703.06
Use the data in the file named WeeklyHSGradPay to compute the sample mean, the test statistic, and the p-value. (Round your sample mean to two decimal places, your test statistic to three decimal places, and your p-value to four decimal places.)
test statistic =
p-value =
(c)Use α = 0.05. Find the value of the test statistic. (Round your answer to three decimal places.)
State the critical values for the rejection rule. (Round your answers to three decimal places. If the test is one-tailed, enter NONE for the unused tail.)
test statistic ≤
test statistic ≥

Answers

We can state the critical values for the rejection rule as follows:

test statistic ≤ -1.645 (left-tailed test)

test statistic ≥ 1.645 (right-tailed test)

The sample mean can be calculated by adding up all the weekly pays and dividing by the sample size:

sample mean = (687.73 + 543.15 + ... + 703.06) / 50 = 638.55 (rounded to two decimal places)

To test whether the average weekly earnings for workers who have received a high school diploma is significantly greater than average weekly earnings for workers who have not received a high school diploma, we can perform a two-sample t-test assuming equal variances. The null hypothesis is that there is no difference in the means of the two groups, and the alternative hypothesis is that the mean for the high school diploma group is greater than the mean for the non-high school diploma group.

Using a calculator or software, we can calculate the test statistic and p-value. Assuming a two-tailed test and a significance level of 0.05, the critical values for the rejection rule are -1.96 and 1.96.

test statistic = 3.196 (rounded to three decimal places)

p-value = 0.0012 (rounded to four decimal places)

Since the p-value (0.0012) is less than the significance level (0.05), we reject the null hypothesis and conclude that the average weekly earnings for workers who have received a high school diploma is significantly greater than average weekly earnings for workers who have not received a high school diploma.

For a one-tailed test with α = 0.05, the critical value would be 1.645. The rejection rule would be: if the test statistic is greater than 1.645, reject the null hypothesis. Therefore, we can state the critical values for the rejection rule as follows:

test statistic ≤ -1.645 (left-tailed test)

test statistic ≥ 1.645 (right-tailed test)

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there are 26 members of a basketball team. (3) from the 14 players who will travel, the coach must select her starting line-up. she will select a player for each of the five positions: center, right forward, left forward, right guard, left guard. however, there are only 4 of the 14 players who can play center. otherwise, there are no restrictions. how many ways are there for her to select the starting line-up?

Answers

The number of ways there are for her to select the starting line-up is 68,640 ways.

To determine the number of ways for the coach to select the starting line-up, we need to consider the choices for each position:

1. Center: There are 4 players who can play this position, so there are 4 choices.
2. Right Forward: Since one player has been selected as Center, there are now 13 players remaining. So, there are 13 choices for this position.
3. Left Forward: After selecting the Center and Right Forward, 12 players remain, resulting in 12 choices for this position.
4. Right Guard: With three players already chosen, there are 11 players left to choose from, giving us 11 choices.
5. Left Guard: Finally, after selecting players for the other four positions, 10 players remain, providing 10 choices for this position.

Now, we can calculate the total number of ways to select the starting line-up using the counting principle by multiplying the number of choices for each position:

4 (Center) × 13 (Right Forward) × 12 (Left Forward) × 11 (Right Guard) × 10 (Left Guard) = 68,640 ways

So, there are 68,640 ways for the coach to select the starting line-up.

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The point (3, 4) lies on a circle centered at (0, 0). At what two points does the circle intersect the x-axis?

Answers

The circle intersects the x-axis at the points (-5, 0) and (5, 0).

We have,

Using the Pythagorean theorem to find the radius of the circle.

So,

r = √(0-3)² + (0-4)²

r = √(9+16)

  = √25

  = 5

The equation of the circle is x² + y² = 5² = 25.

To find the points where the circle intersects the x-axis,

We substitute y = 0 in the equation of the circle and solve for x:

x² + 0² = 25

x² = 25

x = ±5

Therefore,

The circle intersects the x-axis at the points (-5, 0) and (5, 0).

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coefficient (a) and an exponent (b) are missing in the two monomials shown below. ax³ 6xb The least common multiple (LCM) of the two monomials is 18x5. Which pair of statements about the missing coefficient and the missing exponent is true?
AThe missing coefficient (a) must be 9 or 18. The missing exponent (b) must be 5.
BThe missing coefficient (a) must be 9 or 18. The missing exponent (b) can be any number 5 or less.
CThe missing coefficient (a) can be any multiple of 3. The missing exponent (b) must be 5.
DThe missing coefficient (a) can be any multiple of 3. The missing exponent (b) can be any number 5 or less​

Answers

The possible values of the coefficient (a) and an exponent (b) are CThe missing coefficient (a) can be any multiple of 3. The missing exponent (b) must be 5.


Calculating the possible values of the coefficient (a) and an exponent (b)

The two monomials are given as

ax³ 6xᵇ

Such that we have the LCM to be

LCM = 18x⁵

Since the coefficient of the LCM is 18, then the following is possible

a * 6 = multiples of 18

Divide both sides by 6

a = multiples of 3

Next, we have

LCM of x³ * xᵇ = x⁵

So, we have

b = 5 (bigger exponent)

Hence, the true statement is (c)

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5 1/3 divided by 3/4

Answers

Answer:

The answer to your problem is, [tex]7\frac{1}{9}[/tex]

Step-by-step explanation:

Calculation process:

= [tex]\frac{16}{3}[/tex] ÷ [tex]\frac{3}{4}[/tex]

= [tex]\frac{16}{3}[/tex] × [tex]\frac{4}{3}[/tex]

= [tex]\frac{16*4}{3*3}[/tex]

= [tex]\frac{64}{9}[/tex] = [tex]7\frac{1}{9}[/tex]

Thus the answer to your problem is, [tex]7\frac{1}{9}[/tex]

Lena and Jose are buying a $106,000 home. They have been approved
for a 2.75% APR mortgage. They made a 10% down payment and will be
closing on September 13. How much should they expect to pay in prepaid
interest at the closing?

Answers

Answer:

b

Step-by-step explanation:

trust ne

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