Since 1975 the average fuel efficiency of U. S. Cars and light trucks (SUVS) has increased from 13. 5 to 25. 8 mpg, an increase of over 90%! A random sample of 40 cars from a large community got a mean mileage of 28. 1 mpg per vehicle. The porulation S. D is 4. 7 mpg. Estimate the mean gas mileage

The function f(x) that satisfies f'(x) = 5x⁴ - 3x² + 4 and f(-1) = 2 is found out to be f(x) = x⁵ + x³ + 4x + 2.

To find f given f'(x) = 5x⁴ - 3x² + 4 and f(-1) = 2, we need to integrate the derivative once and then use the initial condition to solve for the constant of integration.

First, we integrate f'(x) to get f(x):

f(x) = ∫[from -1 to x] f'(t) dt = ∫[from -1 to x] (5t⁴ - 3t² + 4) dt

= ∫[from -1 to x] 5t⁴ dt - ∫[from -1 to x] 3t² dt + ∫[from -1 to x] 4 dt

= (5/5) x (x⁵ - (-1)⁵) - (3/3) x (x³ - (-1)³) + 4x - 4(-1)

= x⁵ + x³ + 4x + 3

Now we use the initial condition f(-1) = 2 to solve for the constant of integration:

f(-1) = (-1)⁵ + (-1)³ + 4(-1) + 3 + C = 2

=> C = -1

Therefore, the function f(x) that satisfies f'(x) = 5x⁴ - 3x² + 4 and f(-1) = 2 is:

f(x) = x⁵ + x³ + 4x + 2

Learn more about Function :

https://brainly.com/question/29775037

#SPJ4

The probability that the conveyor belt will function for a month with one breakdown is approximately 0.17, or 17%, when rounded to two decimal places.

To find the probability that the conveyor belt will function for a month with one breakdown given a Poisson distribution with λ = 2.8, we can use the following formula:

P(X = k) = (e^(-λ) * (λ^k)) / k!

Where:
- P(X = k) is the probability of having k breakdowns in a month
- e is the base of the natural logarithm (approximately 2.71828)
- λ is the average number of breakdowns per month (2.8)
- k is the desired number of breakdowns in a month (1)

Now, let's plug in the values and calculate the probability:

P(X = 1) = (e^(-2.8) * (2.8^1)) / 1!

P(X = 1) = (0.0608 * 2.8) / 1

P(X = 1) ≈ 0.1702

So, the probability that the conveyor belt will function for a month with one breakdown is approximately 0.17, or 17%, when rounded to two decimal places.

Learn more about Probability: https://brainly.com/question/14210034

#SPJ11

1. The equation of the tangent line is y = 10x - 16 and the equation of the normal line is y = (-1/10)x + 21/5.

2. The limit of the function as x approaches 1 does not exist, the function is discontinuous at x=1.

1. Finding the equation of the tangent and normal line to the curve

[tex]y = x^3 - 2x[/tex] at the point (2,4):

To find the equation of the tangent line at the point (2,4), we need to find

the slope of the tangent line at that point. We can do this by taking the

derivative of the function [tex]y = x^3 - 2x[/tex] and evaluating it at x=2.

[tex]dy/dx = 3x^2 - 2[/tex]

At[tex]x=2, dy/dx = 3(2)^2 - 2 = 10[/tex]

So the slope of the tangent line at x=2 is 10. We can now use the point-

slope form of a line to find the equation of the tangent line.

y - y1 = m(x - x1)

y - 4 = 10(x - 2)

y = 10x - 16

To find the equation of the normal line, we need to find the negative

reciprocal of the slope of the tangent line. The slope of the normal line is

therefore -1/10. We can again use the point-slope form of a line to find

the equation of the normal line.

y - y1 = m(x - x1)

y - 4 = (-1/10)(x - 2)

y = (-1/10)x + 21/5

2. Explaining why f(x) = f(x+1) = x × (x+1) is discontinuous at x=1:

For a function to be continuous at a point, the limit of the function as x

approaches that point must exist and be equal to the value of the

function at that point. In other words, the function must not have any

abrupt jumps or breaks at that point.

In this case, if we try to evaluate the function at x=1, we get f(1) = 1 × 2 = 2.

However, if we try to evaluate the function at x=0.999, we get

f(0.999) = 0.999 × 1.999 = 1.997.

This means that as we approach x=1 from the left, the function values

approach 1.997, but when we actually evaluate the function at x=1, we

get a completely different value of 2.

Similarly, if we try to evaluate the function at x=2, we get f(2) = 2 × 3 = 6.

However, if we try to evaluate the function at x=1.999, we get

f(1.999) = 1.999 × 2.999 = 5.997.

This means that as we approach x=2 from the right, the function values

approach 5.997, but when we actually evaluate the function at x=2, we

get a completely different value of 6.

for such more question on  tangent line

https://brainly.com/question/19132778

#SPJ11

the given information and applying Bayes' Rule, we can find the probability P(D | positive test):

So, the correct answer is 0.0089.

Using the given information and applying Bayes' Rule, we can find the probability P(D | positive test):

P(D | positive test) = P(positive test | D) * P(D) / [P(positive test | D) * P(D) + P(positive test | not D) * P(not D)]

Here, P(D) = 0.001, P(positive test | D) = 0.9, and P(positive test | not D) = 0.1. To find P(not D), we subtract P(D) from 1: P(not D) = 1 - 0.001 = 0.999.

Now, we plug in the values:

P(D | positive test) = (0.9 * 0.001) / [(0.9 * 0.001) + (0.1 * 0.999)]
P(D | positive test) = 0.0009 / (0.0009 + 0.0999)
P(D | positive test) = 0.0009 / 0.1008
P(D | positive test) ≈ 0.0089

So, the correct answer is 0.0089.

learn more about probability

https://brainly.com/question/30034780

#SPJ11

The point estimate of y when x = 0.55 is option c) 1.0905.

To find the point estimate of y when x = 0.55, we need to substitute x = 0.55 into the given options and determine which option gives us the correct value of y. Let's go through the options one by one:

a) 0.17205: If we substitute x = 0.55 into this option, we get 0.17205. This is not the correct value of y.

b) 2.018: If we substitute x = 0.55 into this option, we get 2.018. This is not the correct value of y.

c) 1.0905: If we substitute x = 0.55 into this option, we get 1.0905. This is the correct value of y.

d) -2.018: If we substitute x = 0.55 into this option, we get -2.018. This is not the correct value of y.

e) -0.17205: If we substitute x = 0.55 into this option, we get -0.17205. This is not the correct value of y.

Therefore, the correct answer is option c) 1.0905, as it gives us the correct point estimate of y when x = 0.55.

To learn more about point estimate here:

brainly.com/question/30734674#

#SPJ11

To find the partial derivatives of f(x, y), we differentiate the function with respect to each variable, holding the other variable constant:

fx(x, y) = 2x

fy(x, y) = -1

To evaluate these partial derivatives at the point (6, 0), we simply substitute x = 6 and y = 0:

fx(6, 0) = 2(6) = 12

fy(6, 0) = -1

Therefore, at the point (6, 0), we have:

fx(6, 0) = 12

fy(6, 0) = -1

To find the value of f(x, y) at the point (6, 0), we simply substitute x = 6 and y = 0 into the function:

f(6, 0) = (6)^2 - 0 = 36

Therefore, at the point (6, 0), we have:

f(6, 0) = 36

Learn more about partial derivatives here:

https://brainly.com/question/31397807

#SPJ11

A proportion is two ratios that have been set equal to each other;

a proportion is an equation that can be solved.

n1 = 197,175 (number of children in the vaccine treatment group)

p1 = 39/197,175 = 0.0001977 (proportion of children in the vaccine treatment group who developed the disease)

q1 = 1 - p1 = 1 - 0.0001977 = 0.9998023 (proportion of children in the vaccine treatment group who did not develop the disease)

n2 = 196,303 (number of children in the placebo group)

p2 = 138/196,303 = 0.0007028 (proportion of children in the placebo group who developed the disease)

q2 = 1 - p2 = 1 - 0.0007028 = 0.9992972 (proportion of children in the placebo group who did not develop the disease)

p = (39 + 138)/(197,175 + 196,303) = 177/393,478 = 0.0004496 (overall proportion of children who developed the disease)

q = 1 - p = 1 - 0.0004496 = 0.9995504 (overall proportion of children who did not develop the disease)

learn about proportions,

https://brainly.com/question/1496357

#SPJ11

The standard deviation for the random variable X (the number of wins) for people who play 560 times is approximately 0.1038.

To find the standard deviation for the random variable X, we first need to find the mean (expected value) of X.

The mean of X is simply the product of the number of trials (560) and the probability of winning each trial (1/51949):

mean = 560 × (1/51949) = 0.010767

Next, we need to calculate the variance of X:

variance = (number of trials) × (probability of success) × (probability of failure)

Since we're dealing with a binomial distribution (success or failure trials), we can use the formula:

variance = (number of trials) × (probability of success) × (probability of failure)

= 560 × (1/51949) × (51948/51949)

= 0.010755

Finally, we can find the standard deviation by taking the square root of the variance:

standard deviation = √(variance)

= √(0.010755)

= 0.1038

Therefore, the standard deviation for the random variable X (the number of wins) for people who play 560 times is approximately 0.1038.

To learn more about standard deviation here:

brainly.com/question/23907081#

#SPJ11

The antiderivative of k(x) = 6 - 7/x³ is F(x) = 6x - 7/2x² + C, where C is any constant.

To see as the antiderivative of k(x) = 6 - 7/x³, we really want to coordinate the capability as for x. We can separate the necessary into two sections:

∫(6 - 7/x³) dx = ∫6 dx - ∫7/x³ dx

The essential of a steady is basically the consistent times x:

∫6 dx = 6x + C₁,

where C₁ is a consistent of mix.

To incorporate the subsequent part, we can utilize the power rule of mix:

∫7/x³ dx = - 7/2x² + C₂,

where C₂ is one more steady of combination.

Assembling the two sections, we get:

∫(6 - 7/x³) dx = 6x - 7/2x² + C,

where C = C₁ + C₂ is the steady of incorporation.

In this way, the antiderivative of k(x) = 6 - 7/x³ is given by F(x) = 6x - 7/2x² + C, where C is any steady.

To learn more about antiderivatives, refer:

https://brainly.com/question/31420584

#SPJ4

The correct interpretation of the 95% confidence interval is: "We estimate with 95% confidence that the true population proportion of people who own a tablet computer is between 0.62 and 0.78."

This means that if we were to repeat the survey many times and construct a confidence interval for each sample, 95% of those intervals would contain the true proportion of people in the population who own a tablet computer. The interval (0.62, 0.78) is the range of values that is likely to contain the true population proportion with 95% confidence, based on the sample data.

Hence, the correct interpretation of the 95% confidence interval is:

"We estimate with 95% confidence that the true population proportion of people who own a tablet computer is between 0.62 and 0.78."

Learn more about confidence interval here: https://brainly.com/question/17097944

#SPJ11

Answer:

Plot the points on the graphing calculator. Then generate a linear regression equation. That equation is:

y = 1.633x + 51.568

a) x = 9.5 in., so y = 67.081 in.

b) x = 9.0 in., so y = 66.265 in.

c) x = 15.0 in., so y = 76.062 in.

d) x = 11.5 in., so y = 70.347 in.

The current revenue is $102.90.

The revenue would increase by $13.60 if 73 lawn chairs were sold each day.

The marginal revenue is $58.10 when 70 lawn chairs are sold daily.

R(71) = $161.00, R(72) = $221.30, R(73) = $283.90.

What is marginal revenue?

Marginal revenue is the additional revenue gained from selling one more unit of a product or service. It is the change in total revenue when the quantity sold increases by one unit.

a) To find the current daily revenue, we need to substitute x = 70 into the given function R(x):

[tex]R(70) = 0.006(70)^3 + 0.02(70)^2 + 0.7(70) = 102.9[/tex]

Therefore, the current daily revenue is $102.90.

b) To find the revenue if 73 lawn chairs were sold each day, we need to substitute x = 73 into the function:

[tex]R(73) = 0.006(73)^3 + 0.02(73)^2 + 0.7(73) = 116.5[/tex]

The revenue would increase by $13.60 if 73 lawn chairs were sold each day.

c) To find the marginal revenue when 70 lawn chairs are sold daily, we need to find the derivative of the revenue function with respect to x:

[tex]R'(x) = 0.018x^2 + 0.04x + 0.7[/tex]

Then, we substitute x = 70 into the derivative:

[tex]R'(70) = 0.018(70)^2 + 0.04(70) + 0.7 = 58.1[/tex]

Therefore, the marginal revenue when 70 lawn chairs are sold daily is $58.10.

d) To estimate R(71), R(72), and R(73), we can use the concept of marginal revenue. The marginal revenue at x = 70 gives us an estimate of the additional revenue earned by selling one more lawn chair at that point. We can use this estimate to approximate the revenue for the next three values of x:

R(71) ≈ R(70) + R'(70) = 102.9 + 58.1 = 161.0

R(72) ≈ R(71) + R'(71) ≈ 161.0 + 60.3 = 221.3

R(73) ≈ R(72) + R'(72) ≈ 221.3 + 62.6 = 283.9

Therefore, we estimate that the revenue for selling 71, 72, and 73 lawn chairs daily would be $161.00, $221.30, and $283.90, respectively.

To learn more about marginal revenue visit the link:

https://brainly.com/question/13444663

#SPJ1

The player is expected to lose money over time by playing this game. Therefore, paying 10 cents to play is not a fair price.

Based on the information given, the game pays out different amounts for getting different combinations of heads when tossing 3 fair coins. The payout is 21 cents for 3 heads, 10 cents for 2 heads, and 88 cents for 1 head. The question is whether paying 10 cents to play this game is a fair price.

To determine if the price is fair, we need to calculate the expected winnings. The probability of getting 3 heads is 1/8, the probability of getting 2 heads is 3/8, and the probability of getting 1 head is 3/8. The probability of getting 0 heads (or 3 tails) is also 1/8.

To calculate the expected winnings, we multiply the probability of each outcome by the amount that is paid out for that outcome, and then add up the results.

Expected winnings = (1/8 x 21) + (3/8 x 10) + (3/8 x 88) + (1/8 x 0)
Expected winnings = 2.625 + 3.75 + 33 + 0
Expected winnings = 39.375 cents

Since the expected winnings are higher than the cost to play (10 cents), the game is not fair.

Know more about probability here:

https://brainly.com/question/30034780

#SPJ11

(a) The sample has size 110, and it is from a non-normally distributed population with a known standard deviation of 0.45.

- z =  -3.06

- t =  0.45

- It is unclear which test statistic to use.

(b) The sample has size 14, and it is from a normally distributed population with an unknown standard deviation.

- z = -1.81

- t = 0.46

- It is unclear which test statistic to use.

In scenario (a), the sample has a large size of 110, and it is from a non-normally distributed population with a known standard deviation of 0.45. In this case, we can use the z-test because of the large sample size. The z-test compares the sample mean to the hypothesized population mean in terms of the standard deviation of the sampling distribution. The formula for the z-test is:

z = (x - μ) / (σ / √n)

where x is the sample mean, μ is the hypothesized population mean, σ is the known population standard deviation, and n is the sample size.

Substituting the given values, we get:

z = (1.9 - 2) / (0.45 / √110) = -3.06

Therefore, the test statistic for scenario (a) is z = -3.06.

In scenario (b), the sample has a small size of 14, and it is from a normally distributed population with an unknown standard deviation. In this case, we can use the t-test because of the small sample size and unknown population standard deviation. The t-test compares the sample mean to the hypothesized population mean in terms of the standard error of the sampling distribution. The formula for the t-test is:

t = (x - μ) / (s / √n)

where x is the sample mean, μ is the hypothesized population mean, s is the sample standard deviation, and n is the sample size.

Substituting the given values, we get:

t = (1.9 - 2) / (0.5 / √14) = -1.81

Therefore, the test statistic for scenario (b) is t = -1.81.

To know more about standard deviation here

https://brainly.com/question/16555520

#SPJ4

Answer:

Step-by-step explanation:

Simplify: (1.9 × 1010) + (2.9 × 109)

remember PEMDAS

(1.9 × 1010) + (2.9 × 109) =

1919 + 316.1 =

2235.1

The integral in question is: ∫(2¹/ˣ / x³) dx from 4 to 5 is diveregent.

a) First, we need to find a suitable function for comparison. In this case, let's use g(x) = 1/x³.

b) Since 2^(1/x) > 1 for all x > 0, we have 2¹/ˣ /x³ > 1/x^3, i.e., f(x) > g(x) for x in [4, 5].

c) Now, let's check if the integral of g(x) converges or diverges: ∫(1/x³) dx from 4 to 5.

d) Calculate the integral of g(x): ∫(1/x³) dx = -1/(2x²). Now, evaluate the definite integral from 4 to 5: [-1/(2*5²)] - [-1/(2*4²)] = -1/50 + 1/32 = 1/32 - 1/50 = (50-32)/1600 = 18/1600 = 9/800.

e) Since the integral of g(x) converges, by the Comparison Test, the integral of f(x) = ∫(2¹/ˣ / x³) dx from 4 to 5 also converges. However, the exact value of the integral of f(x) cannot be determined analytically.

To know more about Comparison Test click on below link:

https://brainly.com/question/31362838#

#SPJ11

The percentage of articles written by women in the first extract is 38.2%, while the percentage in Konigsberg's survey is 23.6%.

Therefore, the percentages do not match.

c. No

To determine if the percentages match, we need to calculate the percentage of articles written by women in Konigsberg's survey.
Find the total number of articles surveyed by Konigsberg, which is 1,893.

Find the number of articles written by women, which is 447.

Calculate the percentage of articles written by women in Konigsberg's survey by dividing the number of articles written by women (447) by the total number of articles (1,893) and multiplying by 100.
(447 / 1,893) x 100 = 23.6%.

The first extract contains 38.2% of the articles produced by women, compared to 23.6% in Konigsberg's survey. The percentages do not line up as a result.

c. No.

For similar question on percentage.

https://brainly.com/question/29775174

#SPJ11

To find the intersection point nearest to the y-axis, we need to find the x-value where the two curves intersect and where the distance to the y-axis is smallest. Let's first set the two functions equal to each other and solve for x:

sin x = k (x - π/2)^2 + 1

We can rearrange this equation to the form:

k (x - π/2)^2 = sin x - 1

Since we are looking for the intersection point nearest to the y-axis, we can assume that x is close to 0. We can then use the Taylor series expansion of sin x to approximate sin x as x, so we get:

k (x - π/2)^2 ≈ x - 1

Expanding the square and simplifying, we get a quadratic equation in x:

kx^2 - 2kπx + (kπ^2/2 - 1) = 0

The solution to this equation is:

x = πk ± sqrt[π^2k^2 - 2k(kπ^2/2 - 1)] / 2k

Since we are looking for the solution nearest to 0, we can discard the positive root and focus on the negative root:

x = πk - sqrt[π^2k^2 - (kπ^3 - 2k)] / 2k

To find the value of k, we need to use the fact that the area enclosed by the curves fi(x), f2(x), and the y-axis is 1. This means that we need to integrate the two functions over the interval where they intersect and find the value of k that makes the integral equal to 1. The interval of intersection is between the x-value of the nearest point to the y-axis and the x-value of the point (7/2, 1).

Since the two curves intersect at x = πk - sqrt[π^2k^2 - (kπ^3 - 2k)] / 2k, we can set up the integral as:

∫[πk - sqrt(π^2k^2 - (kπ^3 - 2k)) / 2k, 7/2] [sin x - k(x - π/2)^2 - 1] dx = 1

This integral is difficult to solve analytically, but we can use numerical methods to find the value of k that makes the integral equal to 1. One way to do this is to use a numerical integration method such as Simpson's rule or the trapezoidal rule, and vary the value of k until the integral is closest to 1. Another way is to use a numerical root-finding method such as the bisection method or the Newton-Raphson method, and find the root of the function:

F(k) = ∫[πk - sqrt(π^2k^2 - (kπ^3 - 2k)) / 2k, 7/2] [sin x - k(x - π/2)^2 - 1] dx - 1

Once we find the value of k that makes the integral equal to 1, we can substitute it back into the equation for the intersection point and find the nearest point to the y-axis.

Learn more about Taylor series here:

https://brainly.com/question/29733106

#SPJ11

the average amount of lost class time due to technical problems is 1 hour

i. The approximate average rate that technical problems occur can be calculated using the Poisson distribution formula, where lambda (λ) is the expected number of technical problems per hour:

λ = number of classes * probability of technical problem per class per hour

λ = 100 * 0.06 = 6

Therefore, the approximate average rate that technical problems occur is 6 per hour.

ii. The average amount of lost class time can be calculated by finding the expected value of the service time to fix a technical problem, multiplied by the expected number of technical problems during a class. Since service times are exponentially distributed with a mean of 12 minutes, the service time distribution has a rate parameter of λ = 1/12 per minute.

Let X be the number of technical problems that occur during a class, then X ~ Poisson(λ), where λ = 0.06 (since each class is 1.5 hours long). Let Y be the amount of lost class time due to technical problems, then Y = X * Z, where Z is the service time required to fix a technical problem. Z ~ Exponential(λ = 1/12).

The expected value of Y can be found as follows:

E(Y) = E(X * Z)

E(Y) = E(X) * E(Z) (since X and Z are independent)

E(Y) = λ * (1/λ) (since the mean of an exponential distribution is 1/λ)

E(Y) = 1

Therefore, the average amount of lost class time due to technical problems is 1 hour

learn about probability,

https://brainly.com/question/13604758

#SPJ11

The loss function is L(n) = $4,000n + $80t - $543,000

To make the total costs equal, we need to determine the number of machines that Arther's company needs to purchase.

Let's start by setting up an equation:

Arther's company total cost = Acompany total cost

Arther's company total cost = $543,000

Acompany total cost = $4,000 x number of machines + $80 x number of tests

We don't know the number of tests that will be done, so we'll leave that as a variable.

Acompany total cost = $4,000n + $80t

where n = number of machines and t = number of tests

Now we can substitute the Acompany total cost into our equation:

$543,000 = $4,000n + $80t

To write a loss function, we need to choose one variable to optimize and hold the other variable constant. Let's optimize for the number of machines (n) and hold the number of tests (t) constant.

To optimize for n, we need to isolate it on one side of the equation:

$4,000n = $543,000 - $80t

n = ($543,000 - $80t) / $4,000

Now we can write a loss function that represents the total cost for Arther's company based on the number of machines purchased:

L(n) = $4,000n + $80t - $543,000

where L(n) is the total cost for Arther's company based on the number of machines purchased, n is the number of machines, and t is the number of tests.

We can use this loss function to find the optimal number of machines that will minimize Arther's company's total cost.

Learn more about cost analysis and optimization:https://brainly.com/question/31370673

#SPJ11

The surface area of the pyramid is approximately 183. 44 cm^2. so, the correct option is D).

The formula for the surface area of a pyramid is

surface area = base area + (1/2) x perimeter x slant height

Given that the base area is 30 cm^2 and the slant height is 14 cm, we need to find the perimeter of the base. Since the base is a square, we know that all sides are equal in length. Let's call this length "x":

base area = x^2 = 30

x = √(30) ≈ 5.48 cm

Now we can find the perimeter

perimeter = 4x = 4(5.48) ≈ 21.92 cm

Using the formula for surface area, we can now calculate

surface area = 30 + (1/2)(21.92)(14) ≈ 198.56 cm^2

Therefore, the surface area is approximately 183. 44 cm^2. So, the correct answer is D).

To know more about surface area of pyramid

https://brainly.com/question/1503383

#SPJ4

--The given question is incomplete, the complete question is given

" The dimensions of the pyramid are a base length of 5 cm, height of 12 cm, and slant height of 14 cm.  a base area of 30 cm^2 What is the surface area of the pyramid?

60. 1 cm2

93. 2 cm2

148. 2 cm2

183. 44 cm2"--

Answer:

Part 1:

The sum of the interior angles of a pentagon is 540 degrees.

Part 2:

115° + 95° + 115° + 130° + x = 540°

455° + x = 540°

x = 85°

Risk Ratio = (0.025 cases per person-year) / (0.065 cases per person-year) = 0.3846. The correct answer is D. 0.377. The closest answer to this value is: D. 0.377, answer: D. 0.377

To calculate the risk ratio, we first need to find the incidence rate in both groups.

For the non-OC users:
130 cases / 7000 people / 2000 person-years = 0.0093

For the OC users:
70 cases / 10,000 people / 2800 person-years = 0.0025

Then we divide the incidence rate in the OC group by the incidence rate in the non-OC group:
0.0025 / 0.0093 = 0.2688

Finally, we can express the risk ratio as 1 divided by this number:
1 / 0.2688 = 3.72

Rounded to two decimal places, the risk ratio is 0.38, which matches option D.
To calculate the Risk Ratio, we first need to determine the incidence rate for each group:

1. Non-OC users: 130 cases / 2000 person-years = 0.065 cases per person-year
2. OC users: 70 cases / 2800 person-years = 0.025 cases per person-year

Next, we will divide the incidence rate of OC users by the incidence rate of non-OC users to find the Risk Ratio:

Risk Ratio = (0.025 cases per person-year) / (0.065 cases per person-year) = 0.3846

The closest answer to this value is:

D. 0.377

Your answer: D. 0.377

To learn more about Ratio, click here:

brainly.com/question/28478631

#SPJ11

Answer: f(2) = 95/3.

Step-by-step explanation:

To find f'(x), we need to integrate f''(x) once with respect to x:

f'(x) = ∫ f''(x) dx = ∫ (7x + 2) dx = (7/2)x^2 + 2x + C1

where C1 is a constant of integration. To find the value of C1, we can use the initial condition f'(0) = 3:

f'(0) = (7/2)(0)^2 + 2(0) + C1 = C1 = 3

So, we have:

f'(x) = (7/2)x^2 + 2x + 3

To find f(2), we need to integrate f'(x) once more with respect to x:

f(x) = ∫ f'(x) dx = ∫ [(7/2)x^2 + 2x + 3] dx = (7/6)x^3 + x^2 + 3x + C2

where C2 is another constant of integration. To find the value of C2, we can use the initial condition f(0) = 2:

f(0) = (7/6)(0)^3 + (0)^2 + 3(0) + C2 = C2 = 2

So, we have:

f(x) = (7/6)x^3 + x^2 + 3x + 2

Finally, to find f(2), we substitute x = 2 into the expression for f(x):

f(2) = (7/6)(2)^3 + (2)^2 + 3(2) + 2 = 49/3 + 14 = 95/3

Therefore, f(2) = 95/3.

To learn more about integration, refer below:

https://brainly.com/question/30900582

#SPJ11

the integral of the given function is:

[tex](1/5) * arctan(sin(x)/5) + C[/tex]

Hi! To find the integral of the given function, first let's rewrite it using the provided terms. The function is:

∫[tex]\frac{ cos(x) dx}{  (25 + sin^{2(x)})}[/tex]

Now we will use the substitution method. Let's set:

u = sin(x) => du = cos(x) dx

So, the integral becomes:

∫ du / (25 + u^2)

This is a standard integral form, which can be solved as:

∫ [tex]du / (25 + u^2) = (1/a) * arctan(u/a) + C[/tex]

In our case,[tex]a = 5 (since 25 = 5^2)[/tex], so the integral is:

(1/5) * arctan(u/5) + C = (1/5) * arctan(sin(x)/5) + C

So, the integral of the given function is:

[tex](1/5) * arctan(sin(x)/5) + C[/tex]

learn more about integral

https://brainly.com/question/31433890

#SPJ11

t3 and t2+9 are linearly independent.

To verify that t3 and t2+9 are linearly independent, we need to show that the only solution to the equation c1(t3) + c2(t2+9) = 0 is c1 = 0 and c2 = 0.

Assume that there exist constants c1 and c2, not both zero, such that c1(t3) + c2(t2+9) = 0.

Then, we can rewrite the equation as c1(t3) = -c2(t2+9).

Differentiating both sides with respect to t gives 3c1(t2) = -2c2(t).

We can rearrange this equation to express t2 in terms of t3:

t2 = -\frac{3c1}{2c2}t3.

Substituting this expression for t2 into the original equation gives:

c1(t3) + c2\left(-\frac{3c1}{2c2}t3 + 9\right) = 0.

Simplifying, we get:

\frac{c1}{2}(2t3-9c2) = 0.

Since c1 and c2 are not both zero, we can conclude that 2t3 - 9c2 must be zero.

But this implies that t3 is a multiple of 9/2, which contradicts the fact that t3 is a cubic polynomial.

Therefore, the assumption that there exist nonzero c1 and c2 such that c1(t3) + c2(t2+9) = 0 leads to a contradiction.

Hence, t3 and t2+9 are linearly independent.

To know more about  refer here:

https://brainly.com/question/30720942

#SPJ11

Okay, let's solve this step-by-step:

3√2 + 1 ÷ 2√5 - 3

= 3√2 + 1 / 2√5 - 3 (perform division first)

= 3*√(2) + 1 / 2*√(5) - 3 (expand square roots)

= 3*1.414 + 1 / 2*2.236 - 3 (evaluate square roots)

= 4.242 + 0.447 - 3

= 4.689

So the final simplified expression is:

4.689

Answer:

D

Step-by-step explanation:

Angle V is correspondent to angle w

Answer

Step-by-step explanation:

The horizontal change from triangle ABC to triangle ABC include the following: A. right 5 units.

The vertical change from triangle ABC to triangle ABC include the following: C. down 2 units.

The translation rule in the standard format is: (x, y) → (x + 5, y - 2).

In Mathematics, the translation of a graph to the left is a type of transformation that simply means subtracting a digit from the value on the x-coordinate of the pre-image while the translation of a graph to the right is a type of transformation that simply means adding a digit to the value on the x-coordinate of the pre-image.

By translating the pre-image of triangle ABC horizontally right by 5 units and vertically down 2 units, the coordinate A of triangle ABC include the following:

(x, y)                               →                  (x + 5, y - 2)

A (3, 5)                        →                  (3 + 2, 5 - 2) = A' (5, 3).

Read more on translation here: brainly.com/question/26869095

#SPJ1