# find d/dx (integral from 2 to x^4) tan(x^2) dx tan(x^4)^2*4x^3 MY ANSWER

139,202 results, page 87
1. ## math

How did they get to this answer can someone explain the steps. Directions: Find the future value of each ordinary annuity, if payments are made and interest is compounded as given. R = 15,000; 12.1% interest compounded quarterly for 6 yrs. answer:

asked by student on June 19, 2007
2. ## calculus

a particle moves along a number line measured in cm so that its position at time t sec is given by s=72/(t+2) +k, k is a constant and t>=0 seconds. (a) Find the instantaneous velocity of the particle at t=4 seconds (b) Find the acceleration of the particle

3. ## Physics

A 4.17 g bullet moving at 506.1 m/s penetrates a tree trunk to a depth of 4.64 cm. a) Use work and energy considerations to find the magnitude of the force that stops the bullet. Answer in units of N. b) Assuming that the frictional force is constant,

4. ## Math

Could someone verify the answers. I don't know question C and D Thank you! 1. In physics, the formula for centripetal force is F = mv^2/ r where m is the mass, v the velocity, and r the radius. a) Find the length of a string when a mass of 2.4kg is being

asked by Casey on January 12, 2012
5. ## Chemistry

Hi I'm doing a research paper on the PH of skin and was wondering if you could answer even a few of these questions. I am in high school. Thanks. what does ph have to do with skin? how would using alkaline products affect skin? what are some symptoms

asked by Anonymous on May 6, 2008
6. ## Physics Urgent!

1.You are driving at the speed of 28.7 m/s (64.2138 mph) when suddenly the car in front of you (previously traveling at the same speed) brakes. Considering an average human reaction, you press the brakes 0.427 s later. Assume that the brakes on both cars

asked by Mikayla on November 2, 2016
7. ## Ann

Need to correct the punctuation for each sentence. then right if it is declarative, interrogative, imperateive, or exclamatory. 1. What a strang name that is. Answer=dec 2. Some mushrooms are very poisonous! Answer=exclamatory 3. Don't eat that mushroom!

asked by English on May 12, 2011
8. ## Understanding percentages

Check my answer,, A store advertises a shirt at 25% off the original price of \$44. What is the sale price? MY ANSWER: \$33.00 What is the percentage increase in high school enrollment from 1,165 students to 1,320? MY ANSWER: 13.3%

asked by Anonymous on April 12, 2012
9. ## Chemistry - check answers

1) Which of the following sets is arranged according to increasing base strength? A) F-, OH-, Cl- B) F-, Cl-, OH- C) OH-, F-, Cl- D) OH-, Cl-, F- E) Cl-, F-, OH- (my answer) 2) What is the pH of a solution formed by adding 4.3 x 10^-5 moles of KOH in 1 L

asked by Amanda on April 30, 2014

Thanks for your answer DrBob. I am still stumped.The question I was asked to answer is Do acetic acid and stearic acid undergo controlled oxidation reactions? Explain why/why not and draw an equation to illustrate the answer.

asked by paul on October 4, 2009
11. ## math

-4+[3-10] Just use BEDMAS...bracket, exponent, division and multiplication, addition and subtraction. -4+[3-10] Since 3-10 is in the brackets, you do that first and get -4, so you have -4 + (-4), and your final answer is -8. Raj must have made a typo. 3-10

asked by need help on December 6, 2006
12. ## Math

I posted this under business the first time and got no answer so since its more mathematical here it is again: I can only put away \$1,000 a year toward retirement. I am 22 and plan on retiring at 65 and earning 6%. How much will I have at retirement? Not

asked by Janice on August 18, 2015
13. ## physics

i dont know what the answer is... i got itwrong my answer was 1.78. whats the correct answer? A 57kg trampoline artist jumps vertically upward from the top of a platform with a speed of 4.7m/s. How fast is he going as he lands on the trampoline 3.8m below?

asked by rob on May 16, 2018
14. ## Math

The volume of a spherical balloon of radius r cm is V cm3, where . Find dv/dr My answer: 4πr^2 The balloon leaks at 5cm^3 per second, how fast does the radius of the balloon leaks when the radius is 15 cm. Find the rate at which the radius is changing

asked by NR on April 23, 2018
15. ## Algebra

can somebody please help me with this question I've spent more than 3 hours on this, still nothing Let L1 be the line passing through the point P1=(2, −4, −6) with direction vector →d1=[1, 0, 2]T, and let L2 be the line passing through the point

asked by sara on March 18, 2017
16. ## Math

14. There is a rectangular piece of property that measures 188 ft by 100 ft. On the property there is a circular lake with a diameter of 72 ft. In the center of the lake there is a circular island with radius of 12 ft. The rest of the property is land.

asked by margie o on October 20, 2009
17. ## math finals

14. There is a rectangular piece of property that measures 188 ft by 100 ft. On the property there is a circular lake with a diameter of 72 ft. In the center of the lake there is a circular island with radius of 12 ft. The rest of the property is land.

asked by Jarod on October 24, 2009
18. ## Math

14. There is a rectangular piece of property that measures 188 ft by 100 ft. On the property there is a circular lake with a diameter of 72 ft. In the center of the lake there is a circular island with radius of 12 ft. The rest of the property is land.

asked by jarod on October 24, 2009
19. ## Math

How do you find the point of intersection(s) for x = 2y2 + 3y + 1 and 2x + 3y2 = 0 A) You cannot find points of intersections for non-functions. B) Plug in 0 for x into both equations and solve for y. Then plug that answer back into the other equation to

asked by Andrew on February 12, 2016
20. ## Linear Algebra

Let L1 be the line passing through the point P1=(9, −1, 15) with direction vector →d1=[−2, −1, −3]T, and let L2 be the line passing through the point P2=(9, 4, 8) with direction vector →d2=[−2, −1, −1]T. Find the shortest distance d

asked by Garrett on November 11, 2018
21. ## physics/ torques

A block of mass m = 5 kg is attached to a spring (k = 35 N/m) by a rope that hangs over a pulley of mass M = 7 kg and radius R = 4 cm, as shown in the figure. Treating the pulley as a solid homogeneous disk, neglecting friction at the axle of the pulley,

asked by HELP!!!! on April 3, 2011
22. ## physics

A block of mass m = 5 kg is attached to a spring (k = 35 N/m) by a rope that hangs over a pulley of mass M = 7 kg and radius R = 4 cm, as shown in the figure. Treating the pulley as a solid homogeneous disk, neglecting friction at the axle of the pulley,

asked by Anonymous on April 3, 2011
23. ## physics

A block of mass m = 5 kg is attached to a spring (k = 28 N/m) by a rope that hangs over a pulley of mass M = 7 kg and radius R = 3 cm, as shown in the figure. Treating the pulley as a solid homogeneous disk, neglecting friction at the axle of the pulley,

asked by Anonymous on March 25, 2011
24. ## Algebra 1

Nico drives from school to the store at 25 miles per hour. He drives back to the school (along the same route) at 35 miles per hour, and the returns to the store (via the same route) travelling at 40 miles per hour. Find the average rate for the three

asked by JK on October 30, 2010
25. ## precal

Find all solutions of the equation in the interval , 02π . =2sin2x−2cosx Write your answer in radians in terms of π . If there is more than one solution, separate them with commas.

asked by teresa on August 8, 2016
26. ## Calculus Partial Derivatives

Problem: Find dimensions of a box that provide the greatest volume when the length plus the girth cannot exceed six feet. I tried 2w+2h+l=6, l=6-2w-2h, but couldn't get to w=1, h=1, l=2, which is the correct answer.

asked by Anonymous on July 10, 2015
27. ## math

An unprepared student makes random guesses for the ten true or false questions on a quiz.find the probablity that there is at least one correct answer.

asked by rency on October 27, 2009
28. ## statistics

An unprepared student makes random guesses for the ten true-false questions on a quiz. Find the probability that there is at least one correct answer.

asked by Hannah on March 16, 2015
29. ## Statistics

Assume that adults have IQ scores that are normally distributed with a mean of 100 and a standard deviation of 15. Find the IQ score separating the top 37% from the others. Answer in one decimal place.

asked by Tracy on March 28, 2014
30. ## Statistics

The z-scores that bound the middle 35 % under the standard normal curve are z = -a and z = a. Find the value of a. Write only a positive number as your answer. Round to two decimal places (for example: 0.81).

asked by Obi on October 13, 2015
31. ## related rates word problems

"A man of height 2.2 meters walk away from a 5-meter lamppost at a speed of 1.2 m/s. Find the rate at which his shadow is increasing in length. " what is the answer to this? if anyone can help that would be great

asked by James on February 20, 2016
32. ## special education

I need an answer to a literture question that i can't find. A judge in canto vii,named minos,use his longtail to assign the penalty for each condemned sinner?

asked by jan on October 10, 2011
33. ## Algebra 2

I have no clue on this one. How would you solve: us the (IN) key to express each number as a power. Then use the rules of logarithms to find the answer. (45,332 x 10^5)(33,654 x 10^-4) ------------------------------- 93,153 (that is a fraction.) please

asked by Jonathan on June 18, 2006
34. ## pre calculus work

given f(x)= 5x+4/5x^2+4x and g(x) = 1/x a. determine the domains of f(x) and g(x) b. simplify f(x) and find any vertical asymptotes c. explain how the two functions differ I have absolutely no idea how to answer this question - can you please help me to

asked by erin on August 19, 2016

help me find the answer to this question for tomorrow... can you think of any examples from the real world where lowered genetic diversity is impacting a species' ability to survive?

asked by school8er on January 13, 2011
36. ## statistics

Find the value of z that would be used to test the difference between the proportions, given the following. (Use G - H. Give your answer correct to two decimal places.) Sample n x G n=384 x=314 H n=423 x=329

asked by Tiara on March 18, 2014
37. ## algebra

find the approximate side lenght of a square with an area of 160in^2 to the nearest whole inch pls explain how u got the answer, i don’t understand :/

asked by nani on December 20, 2017
38. ## Trig

Find all solutions of the equation in the interval [0,2pi). sqrt(3)cottheta-1= 0 Write your answer in radians in terms of pi. If there is more than one solution, separate them with commas.

asked by Rachal on May 15, 2011

A tungsten target is struck by electrons that have been accelerated from rest through a 38.9-kV potential difference. Find the shortest wavelength of the radiation emitted. (answer has to be in nm)

asked by Rebecca on June 7, 2012
40. ## math (check)

find the volume of a cylinder with a diameter of 16mm and a height of 5.7. A.2,292mm^3 . . . 4,584mm^3(i think its this one) . . . 689mm^3 . . . . 1,146 (but i also got an answer close to this but the tens place was 5)

asked by luna on March 19, 2014
41. ## math

Find the value of z that would be used to test the difference between the proportions, given the following. (Use G - H. Give your answer correct to two decimal places.) Sample n x G 386 327 H 414 321 .

asked by Tracy on June 27, 2013
42. ## Physics

A solenoid 74.5 cm long has 350 turns and a radius of 2.26 cm. If it carries a current of 1.69 A, find the magnetic field along the axis at its center. Answer in units of T

asked by Alisha on October 16, 2014
43. ## cal 2

Find the number b such that the line y = b divides the region bounded by the curves y = x2 and y = 16 into two regions with equal area. (Round your answer to the nearest hundredth.)

asked by emily on February 12, 2010
44. ## geometry

If the parallel sides of a trapezoid are contained by the lines and , find the equation of the line that contains the midsegment. Show equations and all work that leads to your answer.

asked by Anonymous on April 22, 2012
45. ## Statistics

Find the value of z that would be used to test the difference between the proportions, given the following. (Use G - H. Give your answer correct to two decimal places.) Sample n x G 386 327 H 414 321

asked by Tracy on June 25, 2013
46. ## Math

In ΔABC, A=75 degrees and b=6. Giving your answer in interval notation, find the range of values of a such that: only one triangle is possible. two different triangles are possible. Please explain or show work!

asked by Amber on October 16, 2016
47. ## math

Find the value of z that would be used to test the difference between the proportions, given the following. (Use G - H. Give your answer correct to two decimal places.) Sample n x G 386 327 H 414 321

asked by Glenn D on June 25, 2013
48. ## Statistics

Assume x is normally distributed with mean µ= 15 and standard deviation α= 3-. Use the approximate areas beneath the normal curve, as discussed in this section, to answer the following questions. Find P (X ≥15)- A) 0.50 B) 0.16 C) 0.34 D) 0.84

asked by Stuart on February 22, 2009
49. ## statistics

I do not understand this. Can you please explain it to me and how I am suppose to get the answer? Find the probability that a data value picked at random from a normally distributed population will have a standard score that corresponds to the following:

asked by MissPatte on November 14, 2014
50. ## AP Calc (Limits)

I'm trying to factor this equation in order to find its limit, but I'm not sure how to go about it. I can get the answer by graphing on a calculator but I need to do it without one. Function: F(x)=(x^2-36)/(sqrt(x^2-12x+36)) left, right, and overall lim as

asked by Pax on January 17, 2015
51. ## math

I am not understanding this question. the retail sales tax in north Carolina is 7%. Find the total cost of a \$1210 of sofa. It is hard for me to get this answer.

asked by cora evans on January 4, 2014
52. ## MATH

Explain how to find the sum positive three plus negative eight using chips, a number line, or the rules for adding integers. Give the answer with your explanation.

asked by le on May 23, 2012
53. ## Grammar

What is the irregular plural noun? The teams of oxen pulled the plows across the field. (I CANT FIND THE ANSWER DEPENDING ON THE DEFINITIONS ON THE PAPER AND ONLINE)

asked by Isabel on October 27, 2014
54. ## Math

Find the value of z that would be used to test the difference between the proportions, given the following. (Use G - H. Give your answer correct to two decimal places.) Sample n x G 386 327 H 414 321

asked by Tracy on June 26, 2013
55. ## Math, Precalc

Let ΔABC be a triangle such that b=√8, c=√30, and cos(B)=5/√30. Find all possible values for side length a, entering your answer as a comma-separated list in increasing order.

asked by HELP ME PLS on September 29, 2016
56. ## Government US

The highest rate of inflation (13 percent) since World War II occurred in a. 1955. b. 1963. c. 1979. d. 1991. e. 2002. I cannot find this answer anywhere.

asked by HM on December 5, 2011
57. ## I need help with this math question

Find the weight of the right rectangular prism with length 13 ft, width 6 ft, and height 2.5 ft if the contents weigh 0.02 pounds per cubic inch. I think that the answer is 3.9 by multiplying 6 x 13 x 2.5 x 0.02. Is this right?

asked by robert on November 13, 2007
58. ## finite mathematics

Find the present value of the ordinary annuity. Please round the answer to the nearest cent.\$2,000 per semiannual period for 7 yr at 12%/year compounded semiannually

asked by Anonymous on October 23, 2012
59. ## Calculus

Find the positive value of x which satisfies x = 4.3cos(x). Give the answer to six places of accuracy. Remember to calculate the trig functions in radian mode

asked by J on July 17, 2013
60. ## Physics

A particle moves according to the equation x(t) = (10 m/s2) t2 where x is in meters and t is in seconds. Find the average velocity for the time interval from t1 = 2.0 s to t2 = 3 s. Answer in units of m/s. Please help! I have no idea how to set this up :(

asked by Christie on September 7, 2014
61. ## math, calc 2

Using the disk method, find the volume of a right circular cone with height h and base radius r. I know the answer is 1/3pier^2h, but how do you explain or work out the problem?

asked by George on January 17, 2007
62. ## chem

What is the average [H3O^+] of the vinegar solution at the neutralization point in the titration process? pls need help with this. i tried to research about it but can't find any answer or any explanations anout this. Thanks

asked by akira 12 on December 3, 2012
63. ## social studies

What is a fertile farming region located in Saskatchewan and Alberta noted for wheat production (two words)? This is in a crossword puzzle and I can't find the answer.

asked by Turner on September 22, 2008
64. ## Data Management

Determine the number of ways of selecting four letters, without regard for order, from the word: parallelogram the answer at the back of the book is 150, but i can't seem to find out how to do this.

asked by John on March 6, 2010
65. ## Science

Hello where can i find the answer to this question? For a resident on the equator, during what period of the year (month(s)) is the noon sun shining into a north-facing window?

asked by chris on August 30, 2007
66. ## CAN SOMEBODY PLS GIVE ME THE FORMULA FOR THIS!!???

google is being a pain right now so i cant find a simple answer, its giving me all these complex examples instead I JUST NEED THE FORMULA FOR FINDING THE LATERAL AREA OF A SQUARE PYRAMID. THAT'S ALL. thank you.....

asked by TTR+S&lt;3 on February 26, 2014
67. ## science

I have a question I was wondering if someone could give me a link or idea how to find the answer: What structure on HIV makes it necessary for the virus to be transmitted in moist secretions?

asked by Mike on September 13, 2011
68. ## math

Find the volume of the solid obtained by rotating the region bounded by the given curves about the specified axis. y=1/x^2 y=0 x=4 x=7; about y=–3 i integrated and plugged in values for x and got .61 *pi this is not the right answer been trying for hours

asked by sonia on October 23, 2009
69. ## Calculus

So, I need to graph (with my calculator) this out, and then find the area, and finally the volume. y=(x-1)^1/2, y=0, x=2, x=5; about the x-axis I ended up with some crazy answer like 15π/2, and I believe that's incorrect (but it might be right, idk). Any

asked by Devin on February 17, 2011
70. ## Algebra

The following question is about specific geometric progression Find a_4 and S_4 for 100, −10, 1, . (Round your answer for S4 to three decimal places.) The _ represents subscript.

asked by Merty on May 6, 2015
71. ## math

Find the diameter of the circle(not drawn to scale). BC=13,and DC=19. Round your answer to the nearest tenth. Onc again, without the figure in question, or an accurate description of it, we cannot help you.

asked by Susie on November 26, 2006
72. ## Trig

Find the exact value of: cos315. I have to use the sum angle formula cos(270+45) cos270 cos45 - sin270 sin45 thats all I have. Is the answer at least sqrt 2/2?

asked by does it matter at this point? on March 7, 2008
73. ## Calculus

A function of three variables is given by, f (x,y,t) = x3y2sin t + 4x2t + 5yt2 + 4xycos t Find ft (3.44,0.58,8.1) giving your answer to 3 decimal places. anybody please help me... thanks a million... got stuck with this qns..

asked by Fox on September 29, 2013
74. ## calculus

First, the bond pays 96 + 7 t per year for 10 years. Second, the interest rate is 5.25% compounded continuously. Round your answer to the nearest cent. Find the present value?

asked by Dat nguyen on December 7, 2014
75. ## GRANTHAM

Find the present value of the ordinary annuity. Please round the answer to the nearest cent.\$2,000 per semiannual period for 7 yr at 12%/year compounded semiannually

asked by CHARLES on December 30, 2014
76. ## maths

find the speed of a point on the rim of a 24-cm diameter fly -wheel which is tuning at 2800 revolutions per minute. give your answer in meters per second.

asked by leena on September 22, 2013
77. ## Vectors and Math

The textbook answer is -80 Question: find (3a+4b)(2b+4a) if a= -i-3j+k and b=2i+4j-5k What I did: =6(a)(b) - 12|a|^2 + 2|b|^2 - 4(a)(b) =2(a)(b)-12|a|^2+2|b|^2 substitute a and b with given equations. Added like terms for each part.(too long to write out)

78. ## Eng

In which of the following sentence do you find a verb phrase? A. I shall be all that I am and more. B. June was a collector of memorabilia. C. I believed every word he said. D. The crowed roared as the bull charged. Answer is "D"

asked by Jen on June 1, 2013
79. ## Statistics

Find the value of z that would be used to test the difference between the proportions, given the following. (Use G - H. Give your answer correct to two decimal places.) Sample n x G 375 324 H 414 333

asked by Casey on October 29, 2013
80. ## Math

find the mean μ, for the binomial distribution which has the stated values of n and p. Round answer to the nearest tenth. n = 1632, p = 0.57 A) μ= 930.2 B) μ= 922.7 C) μ= 937.5 D) μ= 939.9

asked by Abby on December 18, 2018
81. ## Pre Calculus

Find the measure of the central angle, in radians, given the area of the sector as 22.6 cm2 and a radius equal to 3.7 cm. Round your answer to the nearest tenth.

asked by Kim on March 23, 2011
82. ## math

Find the volume of the solid obtained by rotating the region bounded by the given curves about the specified axis. y=1/x^2 y=0 x=4 x=7; about y=–3 i integrated and plugged in values for x and got .61 *pi this is not the right answer been trying for hours

asked by sonia on October 23, 2009
83. ## Math

Find the volume of a tank in the form of horizontal cylinder whose radius is 2.6 yd, and length is 8.4 yd. report your answer to the nearest tenth of a cubic yard, and use 3.14.

asked by Sheilah on March 7, 2012
84. ## chemistry

Find the initial concentration of the weak acid or base in an aqueous solution of pyridine (C5H5N) with a pH of 8.65. Kb = 1.80×10e-9 . Answer in units of mol/L

asked by Anonymous on January 28, 2015
85. ## Geometry

In the △PQR, PQ = 39 in, PR = 17 in, and the altitude PN = 15 in. Find QR. can u guys show how to solve the problem(plz include answer) i got 42 by using the pythagorean theorem i am not sure if i am correct but can u check it

asked by Allie on February 17, 2017
86. ## Math

Use the Binomial Theorem to find the fifth term in the expansion (2x+3y)^5. 5!/(5-k)^x^5-kyk 5!/(5-4)!4!^x^5-4y4 (5*4*3*2)/(4*3*2*1) 120/24 5xy^4 (answer) You may not understand the 1st 2 lines I'm sorry just let me know how to make it better.

asked by Jon on March 4, 2008
87. ## Physical Science

If a 1500 kg car is moving 20.0 m/s is brought to a stop by brakes. How many kilocalories of heat are generated in the process? Please include the formula that I should use to find the answer. -Thanks

asked by Sarah on October 26, 2007
88. ## Grammar and composition

on page 807, Exercise B it wants me to amswer the questions and name the reference book I used to find the answer. Question 10 is "What is the number of Buddhists in North America?

asked by Dylan on July 3, 2012
89. ## Laptops

I've been searching a ton of websites but I can't seem to find a proper answer. I'm a first-year Nursing student and I need an opnion on what laptop would best suit me based on my course. Thanks in advance.

asked by Lena on August 1, 2010
90. ## Louisiana History

Do you know the issues that governor Unzaga faced? There is not really a answer choice nor is this a question from school, but I was thinking about this and well if you could just give me a site to look at to find out that would be great... -Thanks

asked by Jennifer on November 11, 2016
91. ## calc

A new software company wants to start selling DVDs with their product. The manager notices that when the price for a DVD is 16 dollars, the company sells 134 units per week. When the price is 27 dollars, the number of DVDs sold decreases to 89 units per

asked by boob on October 10, 2011
92. ## Mathematics

1. The speed of a current in a river is 6 mph. A ferry operator who works that part of the river is looking to buy a new boat for his business. Every day, his route takes him 22.5 miles each way against the current and back to his dock, and he needs to

asked by Olivia N J on February 23, 2017

1. Which of the following energy transformations best describes the operation of a solar powered battery charger? (a) electrical energy --> thermal energy --> kinetic energy (b) nuclear energy --> potential energy --> chemical energy (c) thermal energy -->

asked by Jessica on April 7, 2014
94. ## Design Logic and programming

write a program that ask the student to enter an answer to a math problem. The user should enter two values, one at a time, and then ask for an answer. The program should display if the entered answer is correct or not and display the correct answer if the

asked by Kathleen on February 13, 2012
95. ## AED 201

Search the Internet for three time management tips for teachers. List the tips, in a separate document and answer this question: How do you think these tips will affect your daily schedule as an educator? Provide a comment on how each one serves to improve

asked by Rayna on March 31, 2010
96. ## chem

I need major help im not understanding this at all: Complete and balance each of the following equations for acid-base reactions. (Type your answer using the format CO2 for CO2 and Al(OH)3 for Al(OH)3. Use the lowest possible coefficients.) HBr(aq) +

asked by hannah on November 23, 2010
97. ## Math: Pre-calculus

A rancher wants to build a rectangular pen with an area of 180 . Let W be the width of the pen and L be the length of the pen. a) Find an equation for the perimeter P in terms of W and L . b) Use the given area to write an equation that relates W and L .

asked by Sarah on October 6, 2013
98. ## Trig

Jessica attains a height of 4.7 feet above the launch and landing ramps after 1 second. Her initial velocity is 25 feet per second. To find the angle of her launch, which equation can you use with the given information to solve for θ? (Answer: 1 or 2).

asked by Jessica on June 21, 2012
99. ## math

A manufacturing company manufactures a cardboard box with a square base and a height of 15 inches. Suppose the equation 2 x x 60 7,200 0 can be used to find the length and width of the base of the box, each measuring x inches. Use the zero product property

asked by crissy on April 7, 2016
100. ## Probability

Let N,X1,Y1,X2,Y2,… be independent random variables. The random variable N takes positive integer values and has mean a and variance r. The random variables Xi are independent and identically distributed with mean b and variance s, and the random

asked by qwerty on April 21, 2015