Question 8 Given f(x) = cosh(x) = €¯x+e² find 2 df (4) dx

Answers

Answer 1

The value of df(4)/dx is  (-e⁻⁴ + e⁴)/2 when function f(x) is cosh(x).

To find df(4)/dx, we need to differentiate the function f(x) = cosh(x) with respect to x.

Using the chain rule, the derivative of f(x) with respect to x is given by:

df(x)/dx = d/dx [cosh(x)]

To differentiate cosh(x), we can use the derivative of e^x, which is e^x, and apply the chain rule:

df(x)/dx = d/dx (e⁻ˣ + eˣ)/2

Applying the chain rule to each term separately:

df(x)/dx = (d/dx [e⁻ˣ ] + d/dx [eˣ))/2

The derivative of e⁻ˣ is -e⁻ˣ, and the derivative of eˣ is eˣ:

df(x)/dx = (-e⁻ˣ+ eˣ)/2

Now, to find df(4)/dx, we substitute x = 4 into the derivative:

df(4)/dx = (-e⁻⁴ + e⁴)/2

This is the value of df(4)/dx for the function f(x) = cosh(x).

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Related Questions

9.20. set s = 2z = {2x : x ∈ z}, the set of even integers. prove that s is equicardinal with z.

Answers

To prove that the set S = 2Z = {2x : x ∈ Z}, the set of even integers, is equicardinal with Z, the set of all integers, we need to show that there exists a one-to-one correspondence (bijection) between the two sets.

A one-to-one correspondence between two sets exists if every element of one set is paired with a unique element from the other set, and vice versa.

Let's define a function f: Z -> S such that f(x) = 2x for every x ∈ Z.

This function assigns each integer x from Z to its corresponding even integer 2x in S.

To prove that f is a bijection, we need to show that it is both injective (one-to-one) and surjective (onto).

Injectivity: Suppose f(a) = f(b) for some a, b ∈ Z. Then, 2a = 2b. Dividing both sides by 2, we get a = b. Hence, f is injective.

Surjectivity: For every y ∈ S, y = 2x for some x ∈ Z. Choosing x = y/2, we have f(x) = 2x = y. Therefore, f is surjective.

Since f is both injective and surjective, it is a bijection. Thus, S and Z are equicardinal sets.

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The perimeter of a rectangular field is 298 yards. If the width of the field is 63 yards, what is its length?

Answers

Answer:

The length is 86 yards.

Step-by-step explanation:

63 is the width so,

63 + 63 = 126

Now subtract this from the total perimeter,

298 - 126 = 172

and divide by 2 because there are sides with the same length

172/2 = 86

The length is 86.

A trapezoid has bases of lengths 38 and 52. Find the trapezoids area if it’s height is 8.

Answers

Answer:

360

Step-by-step explanation:

A rectangle has a length of 2x + 1 and a width
of 5x - 4. Which expression best describes the
area of the rectangle?
F 7x - 3
H 10x2 – 3x - 4
J 10x2 + 13x - 4
G 14x - 6

Answers

Answer:

H

Step-by-step explanation:

The rectangle has a length of (2x + 1) and a width of (5x - 4).

And we want to select the expression that represents the rectangle's area.

Recall that a rectangle's area is simply its length multiplied by its width. Thus:

[tex]A=(2x+1)(5x-4)[/tex]

Expand by distributing:

[tex]A=(2x+1)(5x)+(2x+1)(-4)[/tex]

Distribute:

[tex]A=(10x^2+5x)+(-8x-4)[/tex]

Simplify:

[tex]A=10x^2-3x-4[/tex]

Hence, our answer is H.

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Answers

i believe the answer is 36/100

Answer:

Step-by-step explanation:

To find each probability you will state the probability of the first event happening and multiply it by the chance of the second event happening.  

P(2 Nickels):  6/10 x 5/9 = 30/90 (1/3 chance)

P(2 Dimes):  4/10 x 3/9 = 12/90 (4/30 chance)

P(1 nickel and 1 dime): 6/10 x 4/9 = 24/90 (8/30 chance)

I hope this helps :D

Complete the Square of the quadratic equation in standard form: ax2 + bx + c Treat this like a literal equation where you are solving for x by completing the square. To get started, write the equation in the form: x2 + bx = ?

Answers

Answer:

x = [-b ±√(b² - 4ac)]/2a

Step-by-step explanation:

ax² + bx + c = 0

dividing through by a, we have

ax²/a + bx/a + c/a = 0

x² + bx/a + c/a = 0

x² + bx/a = -c/a

we now add th square of half the coefficient of x to both sides, thus

x² + bx/a + (b/2a)² = -c/a +  (b/2a)²

simplifying the left hand side and right hand side, we have

(x + b/2a)² = -c/a + b²/4a²

re-arranging, we have

(x + b/2a)² = b²/4a² - c/a

taking L.C.M of the right hand side, we have

(x + b/2a)² = (b² - 4ac)/4a²

taking square-root of both sides, we have

√(x + b/2a)² = ±√[(b² - 4ac)/4a²]

x + b/2a = ±√(b² - 4ac)/2a

So, x = -b/2a ±√(b² - 4ac)/2a

taking the L.C.M of the right hand side, we have

x = [-b ±√(b² - 4ac)]/2a

Janna is buying a netbook with a flash drive. The total cost c will include the price p of the netbook plus $12.50 for the flashdrive. Which is the dependent variable?

Answers

The dependent variable would be c (for cost) because the total cost depends on the price of the notebook.

M is the midpoint of PQ. PM = 7x + 8 and MQ = 5x+ 20. Find the value of x.​

Answers

M is the midpoint, so PM and MQ are equal,
So you would do 7x+8=5x+20
Then it would be 2x = 12
So 12 / 2, which is 6
X = 6

Suppose Lucy want to make sure that when she reaches into her drawer, she is certain to take out enough gloves so that she will have one matching pair to wear. HOW MANY GLOVES MUST SHE TAKE?

Answers

Answer:

its 2

Step-by-step explanation:

I have consulted many nice people ( my idiot friends) they all say 2 good luck

[x-2]/4=[3x-7]/10 its x-2 dived by 4 not 2/4 same with other side

Answers

Answer:

x = 4

Step-by-step explanation:

Given

[tex]\frac{x-2}{4}[/tex] = [tex]\frac{3x-7}{10}[/tex] ( cross- multiply )

4(3x - 7) = 10(x - 2) ← distribute parenthesis on both sides )

12x - 28 = 10x - 20 ( subtract 10x from both sides )

2x - 28 = - 20 ( add 28 to both sides )

2x = 8 ( divide both sides by 2 )

x = 4

A part manufactured at a factory is known to be 12.05 cm long on average, with a standard deviation of 0.119. One day you suspect that that the part is coming out a little longer than usual, but with the same deviation. You sample 19 at random and find an average length of 12.25. What is the z-score which would be used to test the hypothesis that the part is coming out longer than usual?

Answers

Z-score is used to test the hypothesis that the part is coming out longer than usual. Z-score is defined as the number of standard deviations away from the mean.

It is calculated using the formula z = (x - μ) / σ, where x is the sample mean, μ is the population mean, and σ is the population standard deviation. In the given problem, the population mean is μ = 12.05 cm and the population standard deviation is σ = 0.119 cm. The sample mean is x = 12.25 cm. The sample size is n = 19.

Therefore, the formula to calculate the z-score is Z = (x - μ) / (σ / √n) Substituting the values, we get z = (12.25 - 12.05) / (0.119 / √19) ≈ 6.586Therefore, the z-score which would be used to test the hypothesis that the part is coming out longer than usual is approximately 6.586.

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Find the derivative of f(x) = 8x + 4 at x = 9. (6 points)

Answers

Answer:

f(x) = 76

Step-by-step explanation:

All you do is plug-in for x: (x = 9)

f(x) = 8x + 4

f(x) = 8(9) + 4

f(x) = 72 + 4

f(x) = 76

People were polled on how many books they read the previous year. Initial survey results indicate that s = 13.6 books Complete parts (a) through (d) below. Click the icon to view a partial table of critical values. (n) How many subjects are needed to estimate the mean number of books read the previous year within six books with 90% confidence? This 90% confidence level requires subjects. (Round up to the nearest subject.)

Answers

Approximately 48 subjects are needed to estimate the mean number of books read the previous year within six books with 90% confidence.

To estimate the mean number of books read the previous year within a certain margin of error, we need to determine the sample size required. In this case, we want to estimate the mean with a 90% confidence level and a margin of error of ±6 books.

The formula to calculate the required sample size is given by:

n = (Z * σ / E)²Where:n = sample sizeZ = z-value (corresponding to the desired confidence level)σ = standard deviation (unknown in this case)E = margin of error

Since the standard deviation is unknown, we can use the initial survey result, s = 13.6 books, as an estimate for σ. However, this may result in a larger sample size than necessary.

Referring to the critical values table, we find the z-value corresponding to a 90% confidence level is approximately 1.645. Plugging in the values into the formula:

n = (1.645 * 13.6 / 6)²n ≈ 47.57

Since the sample size must be a whole number, we round up to the nearest subject. Therefore, approximately 48 subjects are needed to estimate the mean number of books read the previous year within six books with 90% confidence.

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The person who answers has an explanation that doesn't have a link, and isn't incorrect gets brainiest. Ok here is the question "What are the first 30 characters in pi aka ~3.141592653589793238462643383 is all I remember."

Answers

Answer:

3.14152628283829299348473929

A pool has a length that is 3 times the width. Write the algebra radical value of the corner to corner distance

Answers

Answer:

The distance between corner to corner is equal to √10 times the width.

D = √10*W

Step-by-step explanation:

For a rectangle of length L and width W, the distance between two opposite corners can be calculated if we use the Pythagorean's theorem, where we can think on the length as one cathetus, the width as another cathetus and the diagonal as the hypotenuse.

Then the length of the diagonal is:

D^2 = L^2 + W^2

D = √( L^2 + W^2)

In this case we know that the length is 3 times the width, then:

L = 3*W

Replacing this in the equation for the diagonal we have:

D = √( (3*W)^2 + W^2) = √( 9*W^2 + W^2)

D = √( 10*W^2) = √10*√W^2 = √10*W

D = √10*W

The distance between corner to corner is equal to √10 times the width.

A snow removal service in Minnesota is deciding to purchase a new snow removal machine. If they dont purchase the machine, they will make $20,000 if the winter is mild, 530,000 il it is typical, and $50,000 the winter is severe. If they purchase the machine, their profits for these conditions will be $30,000, 535,000 and $40,000, respectively. The probability of a mild winter is 0.3. a typical winter is 0.5 and a severe winter is 0.2. What is the EMV for no machine? 32000 34500 35000 31000

Answers

The Europay, Mastercard and Visa (EMV) for not purchase the snow removal machine is $31,000.

The expected monetary value (EMV) for not purchasing the snow removal machine is $31,000. This value is calculated by multiplying the probabilities of each winter condition by the corresponding profits and summing them up. The probabilities for a mild winter, typical winter, and severe winter are 0.3, 0.5, and 0.2, respectively.

The profits for each condition without the machine are $20,000, $530,000, and $50,000. By multiplying each profit by its probability and adding them together, we get the EMV of $31,000 for not purchase the machine.

In detail, the EMV is calculated as follows:

EMV = (Probability of Mild Winter * Profit for Mild Winter) + (Probability of Typical Winter * Profit for Typical Winter) + (Probability of Severe Winter * Profit for Severe Winter)

EMV = (0.3 * $20,000) + (0.5 * $530,000) + (0.2 * $50,000)

EMV = $6,000 + $265,000 + $10,000

EMV = $31,000

Therefore, the EMV for not purchasing the snow removal machine is $31,000.

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Han and Andre were comparing the miles they ran during one week of cross country practice Hantan 12 which was three times as much as Andre
How many they run together during the one week

Answers

Answer:

I don't know.

Step-by-step explanation:

please help, tysm if you do

Answers

Answer: It’s 3

Step-by-step explanation:

Hoped I help :)

One of the legs of a right triangle measures 12 cm and the other leg measures 13 cm find the measure of the hypotenuse if necessary round the nearest 10th

Answers

Answer:

17.7 cm

Step-by-step explanation:

One of the legs of a right triangle measures 12 cm and the other leg measures 13 cm find the measure of the hypotenuse if necessary round the nearest 10th

To find the Hypotenuse of a right angle triangle, we solve using Pythagoras Theorem

Hypotenuse ² = Opposite ² + Adjacent ²

Hypotenuse = √Opposite ² + Adjacent ²

Opposite = 12 cm

Adjacent = 13 cm

Hence,

Hypotenuse = √12² + 13²

= √144 + 169

= 17.691806013 cm

Approximately = 17.7 cm

Therefore, the measure of the Hypotenuse is 17.7 cm

An analyst Is forecasting net Income for Excellence Corporation for the next fiscal year. Her low-end estimate of net Income is $261,000, and her high-end estimate is $312,000. Prior research allows her to assume that net income follows a continuous uniform distribution. The probability that net income will be greater than or equal to $299,500 Is Multiple Choice 75.5% O o 24.5% 84.4% O O 41.6%

Answers

A net income forecast for Excellence Corporation is made by an analyst for the next fiscal year. Low-end estimate of net income is $261,000High-end estimate is $312,000. Net income follows a continuous uniform distribution. To find: The probability that net income will be greater than or equal to $299,500. In order to solve the problem, we need to calculate the probability that net income will be between $299,500 and $312,000.

Then, we will subtract it from the probability that net income will be between $261,000 and $312,000. This difference will give us the required probability. P(261000 <= X <= 312000) = (312000-261000) / (312000-261000) = 0.2P(299500 <= X <= 312000) = (312000-299500) / (312000-261000) = 0.55P(X >= 299500) = P(299500 <= X <= 312000) - P(261000 <= X <= 312000) = 0.55 - 0.2= 0.35 or 35%.

Thus, the probability that net income will be greater than or equal to $299,500 is 35%. Therefore, the answer is: 24.5%.

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If 3 inches represents 25 feet on a scale
drawing, how long will a line segment be
that represents 15 feet?

Answers

Answer:

1.8 inches

Step-by-step explanation:

1. find the # of inches that represents 1 foot.

3/25 = 0.12in

2. to find the length of the line segment that represents 15 feet, multiply 0.12 inches by 15.

0.12*15 = 1.8in


For the following regression model Y = α + βX + u
-Explain how we can test if we adopt the wrong functional forms
of independent variables?

Answers

In order to test if we have adopted the wrong functional forms of independent variables in a regression model Y = α + βX + u, we can use diagnostic plots of the residuals.

Residuals are the differences between the actual values of the dependent variable and the predicted values of the dependent variable. We can plot the residuals against the independent variables to check if there is any functional form that has not been captured by the model, which would indicate that the model has adopted the wrong functional form of independent variables.

If there is no pattern in the residuals when plotted against the independent variables, then it can be concluded that the model has captured the correct functional form of the independent variables. However, if there is a pattern in the residuals, it would indicate that there is some functional form that has not been captured by the model, and we would need to explore different functional forms of the independent variables to see which one fits the data better. This can be done by using different functional forms of the independent variables, such as polynomial, logarithmic, exponential, etc., and comparing the results using various statistical tests.

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If the residuals are normally distributed, then it suggests that the functional form of the independent variable is correct. If they are not, then it suggests that the functional form of the independent variable is incorrect.Overall, it is important to test for the functional forms of independent variables to ensure that the results of the regression model are unbiased and accurate.

In a regression model, it is important to make sure that the functional forms of the independent variables are correct. If they are not, the results of the model may be biased and incorrect. There are several ways to test if the functional forms are correct or not. Below are some of the methods:Plotting the residuals against the independent variable: If the functional form of the independent variable is correct, then the residuals should be randomly distributed around zero, without showing any patterns. If there are patterns in the residuals, then it suggests that the functional form is incorrect. Testing for linearity: One way to test for linearity is by including the square or cubic terms of the independent variable in the model and testing their significance. If the squared or cubic term is significant, then it suggests that the functional form of the independent variable is incorrect. Testing for additivity: One way to test for additivity is by including interaction terms between the independent variables and testing their significance. If the interaction term is significant, then it suggests that the functional form of the independent variable is incorrect. Testing for normality: One way to test for normality is by examining the normal probability plot of the residuals.

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3. Which property justifies rewriting
2r-7x
*(2-7) ?
OA. Associative property of multiplication
OB. Distributive property
OC. Commutative property of multiplication
O D. Associative property of addition

Answers

B distributive property

Two discrete random variables have a joint PMF as described in the following table. PM (m, n) m = 1 2 m = 3 n=1 1/5 7/45 1/9 n = 2 8/45 4/45 2/45 n = 3 2/15 1/15 1/45 (a) Find the marginal PDFs, P(m) and Py(n). Р (b) Find Pr(N=1|M= 2). (c) Find Pr(MEN). (d) Find Pr(M>N).

Answers

a. P(1) = 0.3556, P(2) = 0.3111, P(3) = 0.0444; Py(1) = 0.5333, Py(2) = 0.4444, Py(3) = 0.1222 b. P(N = 1 | M = 2) ≈ 0.2574 c.P(M = 2, N = 3) ≈ 0.038 d.  Pr(M>N) = 0.5333.

a. The marginal probability function of m is given by P(m) = Σn P(m, n) and that of n is given by P(n) = Σm P(m, n).

Thus, the marginal PDFs are: P(1) = 1/5 + 8/45 + 2/15 = 0.3556 P(2) = 7/45 + 4/45 + 1/15 = 0.3111

P(3) = 1/9 + 2/45 + 1/45 = 0.0444 P(1) + P(2) + P(3) = 1 Py(1) = 1/5 + 7/45 + 2/15 = 0.5333

Py(2) = 8/45 + 4/45 + 1/15 = 0.4444 Py(3) = 2/15 + 1/15 + 1/45 = 0.1222 Py(1) + Py(2) + Py(3) = 1.

b. We need to find P(N = 1 | M = 2).

From the joint probability distribution table, we can see that P(N = 1, M = 2) = 8/45. P(M = 2) = 0.3111.

Using the conditional probability formula, P(N = 1 | M = 2) = P(N = 1, M = 2)/P(M = 2) = 8/45 ÷ 0.3111 ≈ 0.2574

c. We need to find the probability that M = E and N = N.

Since the two random variables are independent, we can simply multiply their probabilities: P(M = E, N = N) = P(M = E) × P(N = N).

The probability distribution of M is given by: M=1 with probability 0.3556 M=2 with probability 0.3111 M=3 with probability 0.0444

The probability distribution of N is given by: N=1 with probability 0.5333 N=2 with probability 0.4444 N=3 with probability 0.1222

Therefore, P(M = 2, N = 3) = P(M = 2) × P(N = 3) = 0.3111 × 0.1222 ≈ 0.038

d. We need to find P(M > N).

There are three possible pairs of values for (M, N) such that M > N: (M = 2, N = 1), (M = 3, N = 1), and (M = 3, N = 2).

The probabilities of these pairs of values are: P(M = 2, N = 1) = 1/5 P(M = 3, N = 1) = 1/9 P(M = 3, N = 2) = 1/15

Therefore, P(M > N) = P(M = 2, N = 1) + P(M = 3, N = 1) + P(M = 3, N = 2) = 1/5 + 1/9 + 1/15 = 0.5333.

Answer: a. P(1) = 0.3556, P(2) = 0.3111, P(3) = 0.0444; Py(1) = 0.5333, Py(2) = 0.4444, Py(3) = 0.1222 b. 0.2574 c. 0.038 d. 0.5333

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Mhanifa please help im almost done :)

Answers

Answer:

19)

9/4 = (r - 10)/r9r = 4(r - 10)9r = 4r - 405r = -40r = -8

20)

(x + 6)/x = 10/710x = 7(x + 6)10x = 7x + 423x = 42x = 14

21)

(n - 9)/(n + 5) = 7/47(n + 5) = 4(n - 9)7n + 35 = 4n - 363n = -71n = -71/3

22)

6/(b + 9) = 4/(b + 5)6(b + 5) = 4(b + 9)6b + 30 = 4b + 362b = 6b = 3

23)

8/3 = (v - 9)/(7v + 4)8(7v + 4) = 3(v - 9)56v + 32 = 3v - 2753v = - 59v = -59/53

24)

8/(5x - 4) = 6/(x + 5)8(x + 5) = 6(5x - 4)8x + 40 = 30x - 2422x = 64x = 64/22x = 32/11

Evaluate 3f(2) what is it

Answers

Answer:

the eanswer should be 12

Step-by-step explanation:

i took the test

A brand of uncooked spaghetti comes in a box that is a rectangular prism with a length of 9 inches, a width of 2 inches, and a height of 1 1/2 inches. What is the surface area of the box?

Answers

Answer:

SA = 157 in²

Steps:

SA = 2LW + 2WH + 2LH

SA = 2(9×2) + 2(2×11/2) + 2(9×11/2)

SA = 2×18 + 2×22/2 + 2×99/2

SA = 36 + 22 + 99

SA = 157 in²

The points (x, 3) and (-1, -4) lie on the same line. If the slope of the line is 1, what is
the value of x?
A-3
B 1
C 6
D-6

Answers

Answer:

C)  6

Step-by-step explanation:

use slope formula:

(-4 - 3) / (-1 - x) = 1

cross-multiply:

-7 = -1 - x

-6 = -x

6 = x

I need help thank you

Answers

Answer: 4x-3

Step-by-step explanation: use the slope formula to calculate the slope, then add the y-int to the equation and ur done hope this helps

You measure a wound to be 2.5 inches long. How many millimetres long is the wound? Round to the nearest tenth.

You measure the depth of a wound to be 0.25 inches. How many millimetres is this? Round to the nearest whole number.

Answers

(a) If you measure a wound to be 2.5 inches long, the corresponding length in millimeters is 63.5 mm.

(b) If you measure the depth of a wound to be 0.25 inches, the corresponding length in millimeters is 6.35 mm.

What is the measure of the lengths?

If you measure a wound to be 2.5 inches long, the corresponding length in millimeters is calculated as follows;

1 in = 25.4 mm

2.5 in = ?

? = 2.5 x 25.4 mm

? = 63.5 mm

If you measure the depth of a wound to be 0.25 inches, the corresponding length in millimeters is calculated as follows;

1 in = 25.4 mm

0.25 in = ?

? = 0.25 x 25.4 mm

? = 6.35 mm

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h(a) = 3 - 2a ^ 2 h(- 3) = On each June 30 and December 31 for 10 years, beginning 2010 June 30 (ending 2020 June 30), the entry would be (Remember, calculate interest as Principal x Interest x Frequency of the Year):Debit CreditJune 30 Interest expense A/c[Ro.100,000 x 12% x 6/12] Ro.6,000To Cash A/c Ro.6,000(Being semiannual interest payment)On December 31 (10 years later), the maturity date, the entry would include the last interest payment and the amount of the bond:June 30 Bonds payable Ro.100,000Interest expense 6,000 Find the value of x, Problem is below. Solve correctly for brainiest and 5 stars! Which one of these are not mechanical weathering?a. Sand hitting rocks and breaking the rock into smaller piecesb. Acid rain changing calcite into limestone.c. Water breaking a rock in half.d. Ice wedging causing pieces of rock to break off. Classify each of the bones in the chart below as either long, short, flat, or irregular by placing a check mark in the appropriate column. Also use a check mark to indicate whether the bone is a part of the axial or the appendicular skeleton. Use Figure 8.1 as a guide. Axial Appendicular Short Flat Irregular skeleton skeleton Long Sternum Radius Parietal bone (cranial bone) Phalanx (single bone of a digit) Vertebra 100% of 80 is what number?Select one:160808100 b) A shopping center consists of two stores and two parking lots. In the diagram, w represents the width of Store B in meters. 25 13.5 Which expression for the area of the shopping center is written as the area of the stores plus the area of the parking lots? 38.5(w + 10) 10 Store A Parking Lot A 38.5w + 385 Store B Parking Lot B 25(w + 10) + 13.5(w + 10) (25 + 13.5)(10) + (25 + 13.5)w Question TwoThe concept of sets underlies every branch of modern mathematics for economics. Suppose the universal set is a set of positive integers, Z + , and letX={ x Z + :x Consider the polynomials given below.P(x) = 14 + 3.13 + 2x2 - + 2Q*) = (x3 + 2x2 + 3)(x2 - 2)Determine the operation that results in the simplified expression below.25 + 14 - 513 - 312 + I-8A. P+QB. P.QC. PQD. O-P what's 13.564^4x3.59^-39? Gael has a car loan for $34,570. This loan has a simple interest rate of 3% per year. What is the amount of interest Gael will be charged on his car loan at the end of 5 years? whats the answer ? what bug is this I need to to know. Discuss the UNEP FI's PRB explaining how signatorybanks are expected to comply with the requirements andhow these can be related to prudential risks in at least two sentences tell me three contries we discussed who had faciasts dictators after WW1 and going into WW11 (sure to inculde names) Work out5.2% of 628.55kmGive your answer rounded to 2 DP. what's the ratio of 0.9? There are N bulbs numbered from 1 to N, arranged in a row. The first bulb is plugged into the power socket and each successive bulb is connected to the previous one. (Second bulb to first, third to second) Initially, all the bulbs are turned off. A moment K (for K from 0 to N-1), the A[K]-th bulb is turned on. A bulbs shines if it is one and all the previous bulbs are turned on too. Write a function in java that given an Array A of N different integers from 1 to N, returns the number of moments for which every turned on bulb shines Suppose that 8% of the patients tested in a clinic are infected with HIV. Furthermore, suppose that when a blood test for HIV is given, 92% of the patients infected with HIV test positive and that 9% of the patients not infected with HIV test positive. What is the probability that a patient testing positive for HIV with this test is not infected with HIV? Which expressions are equivalent? 1/5k-2/3j and -2/3j+1/5k1/5k-2/3j and -1/5k+2/3j1/5k-2/3j and 1/5j-2/3k1/5k-2/3j and 2/3j-1/5kplease help!!!!!