What is a disadvantage of electron microscopes compared to light microscopes?

They do not have a very high power of resolution.
They cannot be used to view live specimens.
They can only be used by doctors.
They can only see surface details.

For a population consists of twenty bowerbirds, the closest standard deviation, sd, of the number of them that have bowers featuring reflective decor is equals to the 0.79. So, option(d) is right.

We have a population consists of twenty bowerbirds. The number of bowerbirds have bowers featuring reflective decor

= 6

Now, three of bowerbirds are randomly sampled or selected without replacement from this population. We have to determine the standard deviations, sd the number of them that have bowers featuring reflective decor.

Population size, N = 20

Let X be a random variable for representing number of them that have bowers featuring reflective decor. That is

[tex] X \tilde Binomial (n,p)[/tex], here sample size, n = 3

Probability that the selected bowerbirds have bowers featuring reflective decor, [tex]p = \frac{ 6}{20 }[/tex]

= 0.3

as there that 6 of the initial 20 feature the reflective doors here. The standard deviation of a binomial distribution is computed as, sd =[tex]\sqrt{np(1 - p)}[/tex]

=[tex]\sqrt{3 × 0.3× 0.7}[/tex]

= 0.79

Hence required value is 0.79.

For more information about standard deviations, visit:

https://brainly.com/question/15528025

#SPJ4

Complete question:

a population consists of twenty bowerbirds, six of which have bowers featuring reflective decor. if three of the bowerbirds are randomly sampled without replacement from this population, what is closest to the sd of the number of them that have bowers featuring reflective decor? group of answer choices

a) 0.6

b) 0.75

c)0.77

d)0.79

e) 0.83

f)0.87

The measure of angle is 30.5 degrees.

Protector is a tool to measure any angle in geometry.

Angle is a geometrical shape made by two straight lines in between them.

Here the base line is the right hand side line drew on the protector. So we have to take the value labelled on above in protector.

So in this way we can see that the angle just passes 30 degrees and pointed towards to 5 th division of 10 divisions.

So it is 30 and a half degree that is 30.5 degrees.

Hence the measures of the angle is 30.5 degrees.

To know more about angle here

https://brainly.com/question/1309590

#SPJ1

The question is incomplete. Complete question will be -

The transformation f(x) ↦ f(x) -1/2 shifts the graph of f(x) downward by 2 units.

For example, suppose that point (a, b) lies on the graph of f(x). After applying the transformation f(x) ↦ f(x) - 1/2, the point (a, b - 1/2) lies on the transformed graph.

So, when the original graph of f(x) was above the x-axis, the transformed graph will be shifted downward and intersect the x-axis 1/2 units below where the original graph intersected it.

When the original graph of f(x) was below the x-axis, the transformed graph will be shifted downward and move further away from the x-axis.

Learn more about transformation here:

brainly.com/question/13801312

#SPJ1

The correct answer is option C. Greg will have less than half of his collection.

After Greg sorts his collection of baseball cards, he will give 1/5 of his collection to his brother and sell 4/10 of his collection to a card shop. We can find the total proportion given away or sold:
1/5 + 4/10 = 2/10 + 4/10 = 6/10 = 3/5

Since Greg will give away or sell 3/5 of his collection, he will have 2/5 of his collection left. Comparing this to the given options:

A.) False - Greg will not have exactly half his collection left.
B.) False - Greg will not sell more than half his collection to a card shop.
C.) True - Greg will have less than half of his collection.
D.) False - Greg will not give more than half of his collection to his brother.

Therefore, the correct answer is option C.

know more about total proportion here:

https://brainly.com/question/1496357

#SPJ11

The number of feet in 1 inch is 15 feet.

A scale factor is defined as the ratio between the scale of a given original object and a new object, which is its representation but of a different size (bigger or smaller).

The basic formula to find the scale factor of a figure is expressed as,

Scale factor = Dimensions of the new shape ÷ Dimensions of the original shape.

Given that, in the scale drawing, the length of the cafeteria is 8 inches. the length of the actual cafeteria is 96 feet.

Here, 8 inches = 96 feet

1 inches = 96/8 feet

1 inches = 15 feet

Therefore, the number of feet in 1 inch is 15 feet.

To learn more about the scale factor visit:

brainly.com/question/22312172.

The probability of having the disease given that the person tests positive twice depends on the prevalence of the disease and the accuracy of the test.

Assuming that a person is tested twice and the results are independent of each other, we can calculate the probability of having the disease given that the person tests positive twice. Let's say the probability of testing positive given that the person has the disease is p, and the probability of testing negative given that the person does not have the disease is q. Also, let's assume that the prevalence of the disease in the population is r.

The probability of testing positive twice given that the person has the disease is p^2. The probability of testing positive twice given that the person does not have the disease is (1-r)^2q^2. The probability of testing positive twice is the sum of these probabilities, which is p^2 + (1-r)^2q^2.

Now we can use Bayes' theorem to calculate the probability of having the disease given that the person tests positive twice. The formula is P(D|++) = P(++|D)P(D) / P(++), where P(D|++) is the probability of having the disease given that the person tests positive twice, P(++|D) is the probability of testing positive twice given that the person has the disease (p^2), P(D) is the prevalence of the disease (r), and P(++) is the probability of testing positive twice (p^2 + (1-r)^2q^2).

Substituting the values, we get P(D|++) = p^2*r / (p^2*r + (1-r)^2q^2). Therefore, the probability of having the disease given that the person tests positive twice depends on the prevalence of the disease and the accuracy of the test. If the prevalence of the disease is high and the test is accurate, then the probability of having the disease given a positive result is also high.

Learn more about probability brainly.com/question/30034780

#SPJ11

If we assume that the take-up of the program remains 100%, then we would have less power to detect an effect size of 0.4 standard deviations compared to an effect size of 0.5 standard deviations.

This is because the power of a study design is directly related to the effect size and the number of standard deviations away from the mean. In this case, a smaller effect size of 0.4 standard deviations would be closer to the mean and thus would require a larger sample size or greater statistical power to detect. Therefore, if all other things remain equal, we would have less power to detect a smaller effect size of 0.4 standard deviations compared to a larger effect size of 0.5 standard deviations.
The statistical power of a study design, in this case, 80%, indicates the probability of correctly rejecting the null hypothesis when the treatment effect is 0.5 standard deviations. When the effect size is reduced to 0.4 standard deviations, other things being equal, the power to detect this effect will be lower than 80%. This is because smaller effect sizes are harder to detect, and require larger sample sizes or more stringent significance levels to maintain the same power. So, in this scenario, we have less power to detect an effect size of 0.4 standard deviations compared to 0.5 standard deviations.

To learn more about standard deviations: brainly.com/question/13498201

#SPJ11

Step-by-step explanation:

To find the nth derivative of f(x) = 1/x, we can use the formula for the nth derivative of a power function:

f^(n)(x) = (n!) / (x^(n+1))

where f^(n)(x) represents the nth derivative of f(x), and n! represents the factorial of n.

Using this formula, we can find the nth derivative of f(x) = 1/x as:

f^(n)(x) = (n!) / (x^(n+1))

Therefore, the general formula for the nth derivative of f(x) = 1/x is:

f^(n)(x) = (n!) / (x^(n+1))

where n is a non-negative integer.

The general formula for the n^{\text{th}} n th derivative of f(x) = \frac{1}{x} f ( x ) = 1 x is:
\frac{d^n}{dx^n} f(x) = (-1)^n \frac{n!}{x^{n+1}}

To find the general formula for the n^{\text{th}} n th derivative of f(x) = \frac{1}{x} f ( x ) = 1 x , we can use the formula for the n^{\text{th}} n th derivative of a power function, which is:
\frac{d^n}{dx^n} x^r = r(r-1)(r-2)\cdots(r-n+1) x^{r-n}
In this case, we have f(x) = \frac{1}{x} f ( x ) = 1 x , which can be written as f(x) = x^{-1}.
Using the formula above, we can find the n^{\text{th}} n th derivative of f(x) as follows:
\begin{aligned} \frac{d^n}{dx^n} f(x) &= \frac{d^n}{dx^n} x^{-1} \\ &= (-1)^n n(n-1)(n-2)\cdots(2)(1) x^{-n-1} \\ &= (-1)^n \frac{n!}{x^{n+1}} \end{aligned}
Therefore, the general formula for the n^{\text{th}} n th derivative of f(x) = \frac{1}{x} f ( x ) = 1 x is:
\frac{d^n}{dx^n} f(x) = (-1)^n \frac{n!}{x^{n+1}}

To know more about derivative visit:

https://brainly.com/question/30365299

#SPJ11

Specifying the number of decimal places and special characters to display in a number is known as "formatting."

Specifying the number of decimal places and special characters to display in a number is known as formatting. In order to make numerical data more readable, formatting allows us to present it in a clear and concise way. For example, if we have a large number with multiple decimal places, we can format it to display only a certain number of decimal places to make it easier to read. Special characters, such as currency symbols or percentage signs, can also be added to help make the data more understandable. By specifying the number of decimal places and special characters to display, we can present numerical data in a way that is consistent and easy to understand for ourselves and others.

Visit here to learn more about formatting:
brainly.com/question/11523374

#SPJ11

The expressions that represent the derivative of the function y = f(x) are dy/dx, l'(x), and lim h->0 [f(x+h) - f(x)]/h. These expressions show the rate of change of y with respect to x at any given point on the function.

The other expressions, such as S(x) + f(h), xth dh/dx, lim 10 f(x) + f(h) x+h, and lim 1-0 F(x +h)-f(x)/h, are not equivalent to the derivative of the function. It is important to understand and use the correct expressions for the derivative in order to accurately analyze and interpret the behavior of a given function.

The expressions that represent the derivative of the function y = f(x) are:

1. lim (x→0) [f(x + h) - f(x)] / h
2. dy/dx
3. f'(x)
4. dh/dx

These expressions are used to describe the rate of change of the function y = f(x) with respect to the variable x. They can be used to find the slope of the tangent line to the curve at any given point or to analyze the behavior of the function.

Learn more about derivative at: brainly.com/question/30365299

#SPJ11

Using a t-table with 18 degrees of freedom (10 + 10 - 2), the critical t-value for a one-tailed test with a 1% significance level is 2.898.

To determine if the mean time taken by the piranha to shred 100 sheets is higher than that for the crocodile, we can conduct a two-sample t-test with equal variances. The null hypothesis is that the mean shredding time for the piranha is the same as that for the crocodile, while the alternative hypothesis is that the mean shredding time for the piranha is higher than that for the crocodile.

Let μ1 and μ2 be the population mean shredding times for the piranha and crocodile, respectively. Then, our hypotheses are:

H0: μ1 = μ2

Ha: μ1 > μ2

We can use the t-statistic to test this hypothesis:

t = (x1 - x2) / (s√(2/n))

where x1 and x2 are the sample means, s is the pooled standard deviation, n is the sample size, and √2 is a correction factor for the equal variances assumption.

The pooled standard deviation is calculated as:

s = √(((n1-1)s1^2 + (n2-1)s2^2) / (n1 + n2 - 2))

Substituting the given values into these formulas, we get:

x1 = 203, x2 = 187

s1 = 6, s2 = 5

n1 = n2 = 10

s = √(((10-1)(6^2) + (10-1)(5^2)) / (10 + 10 - 2)) = 5.207

t = (203 - 187) / (5.207√(2/10)) = 9.68

Since our calculated t-value (9.68) is greater than the critical t-value (2.898), we reject the null hypothesis. This means that we have sufficient evidence to conclude that the mean time taken by the piranha to shred 100 sheets is higher than that for the crocodile. Therefore, we can recommend the crocodile shredder over the piranha shredder to the consumer organization.

Learn more about t-table at: brainly.com/question/30762927

#SPJ11

The instantaneous rate of change of a function is the slope of the tangent line to the function at a specific point. It describes the rate at which the function is changing at that exact point.

To find the instantaneous rate of change of the function f(t) = t^2 at t = 3, we need to use definition 1 or 2 of the derivative.

Definition 1: f'(t) = lim h->0 [f(t+h) - f(t)]/h

Plugging in t = 3 and simplifying, we get:

f'(3) = lim h->0 [(3+h)^2 - 3^2]/h
     = lim h->0 [9 + 6h + h^2 - 9]/h
     = lim h->0 (6 + h)
     = 6

Therefore, the instantaneous rate of change of f(t) = t^2 at t = 3 is 6.

Definition 2: f'(t) = lim x->t [f(x) - f(t)]/(x - t)

Plugging in t = 3 and simplifying, we get:

f'(3) = lim x->3 [(x)^2 - 3^2]/(x - 3)
     = lim x->3 (x + 3)
     = 6

Therefore, the instantaneous rate of change of f(t) = t^2 at t = 3 is also 6 using definition 2.

To know more about instantaneous rate of change of a function  visit:
https://brainly.com/question/31402058

#SPJ11

The product of the numbers using scientific notation is 7.392 * 10³.

Scientific notation is a way of expressing numbers that are too large or too small (usually would result in a long string of digits) to be conveniently written in decimal form e.g. 1000000 = 10⁶ and 0.0001 = 10⁻⁴

We have:

30.8 * 10⁶ = 3.08 * 10⁷

0.00024 = 2.4 * 10⁻⁴

(3.08 * 10⁷) * (2.4 * 10⁻⁴) = (3.08 * 2.4) * 10⁷⁺⁽⁻⁴⁾

                                       = (7.392) * 10⁷⁻⁴

                                       = 7.392 * 10³

Learn more about Scientific notation on:

brainly.com/question/27862246

#SPJ1

The height of the 1-cup measuring cylinder with a radius of 2 inches is approximately 1.1508 inches.

The formula for the volume of a cylinder is V = πr^2h, where V is the volume, r is the radius, and h is the height.

We know that 1 cup is equal to 14.4375 in^3. So, we can set up an equation:

14.4375 = π(2)^2h

Simplifying, we get:

14.4375 = 4πh

Dividing by 4π, we get:

h = 14.4375 / (4π) ≈ 1.1508 inches

Therefore, the height of the 1-cup measuring cylinder with a radius of 2 inches is approximately 1.1508 inches.

Learn more about cylinder here

https://brainly.com/question/9554871

#SPJ11

Assuming a minimum payment of 2% of the balance, the minimum payment for this balance transfer would be $60.

When a cardholder transfers a balance to a credit card, they are essentially moving the balance from one account to another. The new account may have different terms and conditions, such as interest rates and fees, compared to the original account.

In this case, the cardholder is transferring a balance of $3000 at a balance transfer rate of 4.99%, which is the interest rate charged on the balance transfer amount.

In addition, there is a fee of 4% of the balance transfer amount, which comes to $120.

Therefore, the total balance on the new account would be $3120.

The minimum payment for a credit card is the smallest amount that a cardholder can pay each month to avoid late fees and other penalties. Credit card issuers typically require a minimum payment of 1% to 3% of the balance or a fixed dollar amount, whichever is greater.

It's important to note that making only the minimum payment each month can result in a long-term balance, as interest charges can accrue over time. Therefore, it's recommended that cardholders pay more than the minimum payment each month to pay off the balance faster and save on interest charges.

Hence, assuming a minimum payment of 2% of the balance, the minimum payment for this balance transfer would be $60 (2% of $3120).

To learn more about interest rates, click here: brainly.com/question/29451175

#SPJ11

The probability of not getting a 4 is 0.75.

Given is a spinner spins with having fours numbers on it,

We need to find the probability of not having a 4,

So, the probability of not event = 1-P(E)

Also the list of outcomes = 1, 2, 3, 4

Therefore, here,

The probability of getting 4 = 1/4 = 0.25

Therefore the probability of not getting a 4 = 1-1/4 = 3/4 = 0.75

Hence the probability of not getting a 4 is 0.75.

learn more about probability click;

https://brainly.com/question/11234923

#SPJ1

The simplified polynomial is -3x(x+2)(2x-1)

Given is a polynomial we need to simplify it,

-3x³ + 9x² + 30x -3x³-18x² - 24x

= -6x³ + 9x² + 30x -18x² - 24x

= -6x³-9x²+6x

= -3x(2x²-3x+2)

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

Hence the simplified polynomial is -3x(x+2)(2x-1)

Learn more about polynomial click;

https://brainly.com/question/11536910

#SPJ1

The first triangle is isosceles triangle so it is a acute triangle

The second triangle is a right triangle as one angle is 90 degrees

The third triangle is obtuse triangle

A right triangle has one angle that's 90° and a corner that looks like an L.

Obtuse triangles have one angle that's greater than 90°

Acute triangles have one angle that's lesser than 90°

The first triangle is isosceles triangle so it is a acute triangle

The second triangle is a right triangle as one angle is 90 degrees

The third triangle is obtuse triangle

To learn more on Triangles click:

https://brainly.com/question/2773823

#SPJ1

The type of drawing commonly describes hydraulic and pneumatic circuits electrical power and fluid flow is fluid power.

The technologies of hydraulics and pneumatics are referred to as fluid power. Both systems transfer electricity from one place to another using a fluid (liquid or gas). In pneumatics, the fluid is a gas, whereas in hydraulics, the fluid power is typically a liquid (oil) (usually compressed air).

Both are methods of power transmission, which is the science of transforming energy into a form that is more usable and transferring it to the locations where it is required. Electrical, mechanical, and hydraulic power are the three most popular ways to transmit power.

Although they are occasionally seen as rival technologies, there is no one type of power transmission that is ideal for all uses. In actuality, a variety of technologies are used to suit the majority of applications. However, compared to other methods, fluid power has several significant advantages.

To know more about fluid power click here:

brainly.com/question/12947998

#SPJ1

complete question:

which type of drawing commonly describes hydraulic and pneumatic circuits electrical power and fluid flow

C. Electric

Confirmed answer with AI.

I hope this helped! :)

No, it is not possible to construct a triangle with interior angle measures of 70°, 40°, and 50°.

The sum of the interior angles of a triangle is always 180 degrees. If we add the given angle measures, we get:

70° + 40° + 50° = 160°

This sum is less than 180 degrees, which means it is not possible to construct a triangle with these angle measures.

Additionally, the largest angle in a triangle must be less than 180 degrees. In this case, the 70-degree angle is larger than 180 degrees, which is another indication that a triangle cannot be constructed with these angle measures.

Therefore, we can conclude that it is not possible to construct a triangle with interior angle measures of 70°, 40°, and 50°.

Learn more about triangle here

https://brainly.com/question/17335144

#SPJ11

Thus, the value of the function for the given Laplace transformation is:

y(t)=(1/6)*∫[0,t]sin(6(t-u))du+30u(t-3)sin(6(t-3))

To take the Laplace transform of both sides of the given differential equation, we will use the fact that L{y''(t)}=s^2Y(s)-s*y(0)-y'(0) and L{g(t)}=G(s), where G(s) is the Laplace transform of g(t).

Thus, we have:
s^2Y(s)-s*0-0+36Y(s)=G(s)

Simplifying:
Y(s)(s^2+36)=G(s)

Solving for Y(s):
Y(s)=G(s)/(s^2+36)

To take the inverse Laplace transform of both sides, we will use the fact that L^-1{F(s)/s}=∫[0,∞]f(t)dt and L^-1{F(s)/(s^2+w^2)}=1/w*sin(wt).

Thus, we have:
y(t)=L^-1{Y(s)}=L^-1{G(s)/(s^2+36)}

Breaking up G(s) into two terms based on the definition of g(t), we have:
y(t)=L^-1{(t/(s^2+36))+(30e^(-3s)/(s^2+36))}

Taking the inverse Laplace transform of the first term:
L^-1{(t/(s^2+36))}=∫[0,t](1/6)*sin(6(t-u))du

Taking the inverse Laplace transform of the second term:
L^-1{(30e^(-3s)/(s^2+36))}=30u(t-3)sin(6(t-3))

Thus, our final solution for y(t) is:

y(t)=(1/6)*∫[0,t]sin(6(t-u))du+30u(t-3)sin(6(t-3))

Know more about the Laplace transformation

https://brainly.com/question/29583725

#SPJ11

To answer this question, we need to know the median and upper quartile of the data set. Once we have these values, we can determine what percentage of the data falls to the right of the median and to the left of the upper quartile.
Let's say the median of the data set is 50 and the upper quartile is 75. To find the percentage of measurements to the right of the median, we need to look at the data values that are greater than 50 and divide that number by the total number of measurements. Let's say there are 40 data values greater than 50 and a total of 100 measurements.

Then, the percentage of measurements to the right of the median would be:

(40/100) x 100% = 40%

To find the percentage of measurements to the left of the upper quartile, we need to look at the data values that are less than or equal to 75 and divide that number by the total number of measurements. Let's say there are 60 data values less than or equal to 75 and a total of 100 measurements. Then, the percentage of measurements to the left of the upper quartile would be:

(60/100) x 100% = 60%


Your answer:
1. 40% of the measurements lie to the right of the median.
2. 60% of the measurements lie to the left of the upper quartile (Q3).

To learn more about quartile : brainly.com/question/17198478

#SPJ11

The regression output should include the equation in the form of Y = a + b1X1 + b2X2 + b3X3, where Y is the predicted value of customer traffic, X1 is advertising expenditure, X2 is facility size, and X3 is the urban dummy variable.

To create a regression model in Excel, you can follow these steps:

Collect the data:

You will need data for customer traffic, advertising, facility size, and location.

Let's say you have collected data from 50 stores, including customer traffic, advertising expenditure, facility size, and whether the location is urban or suburban.

Open Excel and create a new spreadsheet.

Enter your data into the spreadsheet, with each variable in its own column.

Make sure the columns have headings, and the data is organized correctly.

Create dummy variables for location.

Since suburban is the base case, you can create a new column for an urban dummy variable.

Assign a value of 1 to urban and 0 to suburban.

Create a scatter plot of the data to see if there is a relationship between customer traffic and the other variables.

To create the regression model, go to the "Data" tab and click on "Data Analysis.

Select "Regression" from the list of options and click "OK."

In the regression dialog box, enter the input range for your independent variables (advertising, facility size, and the urban dummy variable).

Enter the output range for the dependent variable (customer traffic).

Check the "Labels" box if you have included column headings in your data.

Check the "Output Range" box to specify where you want the regression output to appear.

Click "OK" to run the regression analysis.

Review the regression output to see the coefficients for each variable and the R-squared value.

To predict customer traffic for an urban location with advertising of [tex]$28[/tex]hundred and a facility size of 2.7 acres, you can use the regression equation.

Substitute the values for X1, X2, and X3 into the regression equation and calculate the predicted value of Y.

You may need to adjust the decimal places of the coefficients and predicted value to match the precision of your data.

Once you have created your regression model, you can use it to predict customer traffic for different combinations of advertising, facility size, and location.

For similar questions on predicted value

https://brainly.com/question/29061537

#SPJ11

The length of the marsh, AC, is approximately 345.7 meters.

From the given information, we can see that the surveyor has formed a right triangle ABC, where AB is the distance walked by the surveyor and AC is the length of the marsh.

Using the Pythagorean theorem, we can find the length of AC:

AC² = AB² - BC²

AC² = (410m)² - (220m)²

AC² = 168,100m² - 48,400m²

AC² = 119,700m²

AC ≈ √119,700m²

AC ≈ 345.7m (rounded to one decimal place)

Therefore, the length of the marsh, AC, is approximately 345.7 meters.

Learn more about length here

https://brainly.com/question/28108430

#SPJ11

The given triangle is a scalene triangle.

A scalene triangle is a type of triangle where all three sides are of different lengths. In this case, the sides of the triangle are given as 6 inches, 10 inches, and 15 inches, which are all different lengths. Therefore, the triangle is a scalene triangle. It is worth noting that a scalene triangle can also be classified as an acute, obtuse, or right triangle based on the measure of its angles. However, this information is not given in the problem, so we cannot determine if the triangle is acute, obtuse, or right.

Learn more about triangle here

https://brainly.com/question/17335144

#SPJ11

Answer:

  b) (x - 11)^2 + y^2 = 1

Step-by-step explanation:

You want an equation in x and y that defines the same relation as ...

This trig identity can be used to relate x and y:

  sin(t)² + cos(t)² = 1

Solving for sin(t), we have ...

  x(t) = 11 -sin(t)

  sin(t) = 11 -x(t) . . . . . . . add sin(t)-x(t) to both sides

The equation for y(t) already gives an expression for cos(t):

  cos(t) = y(t)

Using these expressions for sine and cosine in the trig identity, we have ...

  sin(t)² + cos(t)² = 1

  (11 -x)² +y² = 1

The square (11 -x)² is unchanged if we reverse the terms:

  (x -11)² +y² = 1

The equation that expresses the curve given by x(t) = 11 – sin(t) and y(t) = cos(t) in terms of x and y is an

option a) x² + y^2 = 121.

To express the curve given by the parametric equations x(t) = 11 – sin(t) and y(t) = cos(t) in terms of x and y, we can use the standard trigonometric identities sin^2(t) + cos^2(t) = 1 and cos^2(t) = 1 - sin^2(t).

First, we can square both sides of

x(t) = 11 – sin(t) to get x^2 = (11 – sin(t))^2 = 121 - 22sin(t) + sin^2(t).

Then, we can substitute

1 - cos^2(t) for sin^2(t) to get x^2 = 121 - 22sin(t) + 1 - cos^2(t) = 122 - 22sin(t) - cos^2(t).

Next, we can square both sides of y(t) = cos(t) to get y^2 = cos^2(t). Then, we can substitute cos^2(t) for y^2 in the equation we found for x^2 to get x^2 + y^2 = 122 - 22sin(t) - y^2.

Using the identity sin^2(t) + cos^2(t) = 1 again, we can simplify this to x^2 + y^2 = 121.

Therefore, the equation that expresses the curve given by x(t) = 11 – sin(t) and y(t) = cos(t) in terms of x and y is option a) x² + y^2 = 121.

To learn more about Equation :

https://brainly.com/question/17145398

#SPJ11

Therefore, the equation of the tangent line at x = 2 is y = 5x - 6.

The equation of the tangent line at x = 2 can be found using the point-slope formula: y - y1 = m(x - x1), where (x1, y1) is the given point on the curve and m is the slope of the tangent line at that point.
In this case, we are given that y(2) = 4 and y'(2) = 5. This means that the point on the curve at x = 2 is (2, 4) and the slope of the tangent line at that point is 5.
Using the point-slope formula, we can plug in these values and simplify:
y - 4 = 5(x - 2)
y - 4 = 5x - 10
y = 5x - 6
Therefore, the equation of the tangent line at x = 2 is y = 5x - 6.

To know more about tangent line visit:-

https://brainly.com/question/31326507

#SPJ11

From the chi-square test for claim about the variance of a typhoid shot used in clinical test,

a) The chi-square test statistic value is 8.82 and critical value is greater than significance level, so we reject the null hypothesis. So, claim is true.

b) degree of freedom is 22.

c) 90% confidence interval for the population standard deviation is equals to (2.3427,6.4569).

The chi-square test one of statistic test for testing the variances. It is a right-tailed test and the degree of freedom for a one-sample is n -1. We have new kind of typhoid shot is being developed by medical research team. In case of old typhoid shot

mean time = 36 months

standard deviation = 3 months. To test the variability of time of the new shot, a random sample with

Sample size, n = 23 people and

Standard deviation = 1.9 months.Consider the hypotheses will be, [tex]H_0: σ² =9[/tex]

[tex]H_1: σ²<9[/tex]

The value of chi-square test statistic will be, [tex]TS= \frac{(n−1)s²}{σ²}[/tex]

[tex]= \frac{22×(1.9)²}{9}[/tex] = 8.82

So the test statistic is 8.82. Using the chi-square table the critical value will be,

[tex]χ²_{22}=12.338[/tex]

Since the test statistics lies in the rejection region, we will reject the null hypothesis.

(b) The degrees of freedom will be

[tex]χ_{n - 1}^2=χ_{22}^2[/tex]

So the degrees of freedom will be 22.

(c) The 90% confidence interval for the population standard deviation will be,

[tex]\frac{ (n−1)s²}{ χ_{n−1,1−\frac{\alpha}{2}}^{2} } < σ < \frac{(n−1)s²}{χ_{n−1,\frac{α}{2}}^2}[/tex]

[tex]\frac{22 ( 1.9)²}{33.9}< σ < \frac{22( 1.9)²}{12.3}[/tex]

= 2.3427 < σ < 6.4569

Hence, the confidence interval σ∈ (2.3427 ,6.4569).

For more information about chi-square test, visit :

https://brainly.com/question/30054864

#SPJ4

Complete question:

A new kind of typhoid shot is being developed by a medical research team. The old typhoid shot was known to protect the population for a mean time of 36 months, with a standard deviation of

3 months. To test the time variability of the newshot, a random sample of 23 people were given the new shot. Regular blood tests showed that the sample standard deviation of protection times was 1.9 months. Using a 0.05 level of significance, test the claim that the new typhoid shot has a smaller variance of protection times.

a. Find the value of the chi-square statistic for the sample. (Round your answer to two decimal places.)

b. What are the degrees of freedom?

c. Find a 90% confidence interval for the population standard deviation.

Answer:

b = 9 cm

Step-by-step explanation:

the area (A) of a triangle is calculated as

A = [tex]\frac{1}{2}[/tex] bh ( b is the base and h the height )

here h = 2b , then

[tex]\frac{1}{2}[/tex] × b × 2b = 81

[tex]\frac{1}{2}[/tex] × 2b² = 81

b² = 81 ( take square root of both sides )

b = [tex]\sqrt{81}[/tex] = 9 cm

A number than divided by eight then add 73 if the result is 85 The number that you thought of first is 96.

Let x be the number that you thought of.

According to the given information, when you divide x by 8 and add 73, the result is 85. We can express this as an equation:

(x/8) + 73 = 85

Subtracting 73 from both sides of the equation, we get:

x/8 = 12

Multiplying both sides of the equation by 8, we get:

x = 96

Therefore, the number that you thought of first is 96.

Learn more about thought here

https://brainly.com/question/27964672

#SPJ11