jh

Most popular questions and responses by jh
  1. Precalculus

    NEED HELP ASAP PLEASE!! A bacteria culture starts with 2000 bacteria and the population doubles every 3 hours. a) A function that models the number of bacteria after t hours is p(t)=____________? b) The number of bacteria present after 5 hours will be

    asked on March 4, 2010
  2. Precalculus

    A line segment has endpoints A=(1,3) and B=(13,19). a) Find the equation of the circle for which the segment AB is a diameter. Ans: (x - 7)^2 + (y - 11)^2 = 100 b) Accurate to the nearest tenth, the circumference of this circle is _______ ? I was able to

    asked on March 9, 2010
  3. Precalculus

    NEED HELP ASAP PLEASE!! A savings account starts with $600 and pays 5% interest per year, compounded four times per year. a) A function that models the amount in dollars in the bank account after m years is A(m)=____________? b) How much will be in the

    asked on March 4, 2010
  4. physics

    A riverboat travels with a velocity of 4.60 m/s from one shore to another. The velocity of the river is 2.30 m/s. If the width of the river is 72.0 m, how far does the boat travel downstream to reach the other shore?

    asked on September 21, 2016
  5. chemistry

    a solution contains 0.216 moles of a base and 0.614 moles of the conjuagte acid in a total volume of 800 mL. The pH of the solution 9.65. what is the value for kb of the base? the answer is 1.27E-4 how do you do it? do you need to convert from moles to

    asked on March 27, 2015
  6. Precalculus

    Suppose h(x) = 3/x^2-1. Find two nontrivial functions such that h(x)=(f o g)(x) (f o g referring to f of g)

    asked on January 31, 2010
  7. Precalculus(NEED HELP ASAP PLEASE!!)

    cot(theta)= 3 pi < theta < 3pi/2 Find: sin(theta)= -1 ? cos(theta)= -3 ? tan(theta)= 1/3 ? sec(theta)= -1/3 ? csc(theta)= -1 ? That's what I came up with, but they are not correct, PLEASE help me where I went wrong!!

    asked on March 28, 2010
  8. Precalculus(NEED HELP ASAP PLEASE!!)

    PLEASE HELP!! csc(theta)= -3/2 3pi/2 < theta < 2pi Find: sin(theta)= _____ ? cos(theta)= _____ ? tan(theta)= _____ ? cot(theta)= _____ ? sec(theta)= _____ ?

    asked on March 28, 2010
  9. Math

    Evaluate the expression without using a calculator: log4(2)= ____? Use a calculator to find the logarithm accurate to four decimal places: log4(27)= ____?

    asked on February 14, 2010
  10. Precalculus

    Find two points, one on the horizontal axis and one on the vertical axis, such that the distance between these two points equals 15. NEED HELP PLEASE!!

    asked on March 9, 2010
  11. Precalculus(NEED HELP ASAP PLEASE!!)

    NEED HELP ASAP PLEASE!! A high sound level of 120 dB is regarded as the threshold of pain for the average listener. If the threshold of hearing is 10^−12 watts/m^2, then the intensity of the sound corresponding to 120 dB is ____________ watts/m^2.

    asked on March 7, 2010
  12. Precalculus

    PLEASE HELP!! Solve: 1. cos(arcsin(4/5))= ?? 2. tan(arccos(4/5))= ?? 3. cos(arctan(3))= ?? Note: Give exact answers!!

    asked on April 6, 2010
  13. Precalculus

    Please help me with these questions ASAP!! Suppose that f(x)=log3(x-1) a)If f(6)=1.4 and f(8)=1.7,then evaluate log3(35) and log3(7/5). b)If f(3)=0.6, find log9(2).

    asked on March 3, 2010
  14. Precalculus(NEED HELP ASAP PLEASE!!)

    Solve: sin(theta)+cos(theta) = 1 0 < or equal to theta < 2pi Solution Set:__________ ?

    asked on March 25, 2010
  15. Precalculus

    Polynomials Problem: 1. List two factors of h(x) of the form x−r: x, x + 2 (right answer) 2. A function of the form ax^n that approximates h(x) for large values of |x| is f(x)= 2x^4. (right answer) 3. This tells us that the degree of h is 4 and the

    asked on February 7, 2010
  16. Precalculus

    Give an example to show that the product of two one-to-one function is not necessarily a one-to-one function.

    asked on January 31, 2010
  17. Precalculus(NEED HELP ASAP PLEASE!!)

    Solve: sin(theta)cos(theta)-sin(theta)−cos(theta)+1 = 0, 0 < or equal to theta < 2pi Solution Set: ____________ ?

    asked on March 25, 2010
  18. Precalculus

    Can anyone help me with this question please!! Show that (cosh x)^2 - (sinh x)^2 = 1 for every real number x.

    asked on March 22, 2010
  19. Precalculus

    Suppose f is a function with exponential decay. Explain why the function g defined by g(x)=1/f(x) is a function with exponential growth. PLEASE HELP!!

    asked on March 10, 2010
  20. Precalculus

    Polynomials Problem: 1. List three factors of g(x) of the form x−r: x + 1, x - 1, x - 2 2. The smallest possible value for the degree of g is 3. 3. A function of the form axn that approximates g(x) for large values of |x| is f(x)= 3x^3. 4. This tells us

    asked on February 7, 2010
  21. Precalculus

    I REALLY NEED HELP WITH THIS QUESTION, PLEASE HELP!! Give an example of a logarithmic function g, which has a vertical asymptote x = –2, and passes through the origin.

    asked on March 3, 2010
  22. physics

    a man weighs 162 pounds, and is 69 inches tall. his forearm is parallel to the ground. he holds an 8 pound weight in his hand. the biceps has an angle of insertion of 85 degrees with a distance of 1.4 inches at insertion. the system is equilibrium. what

    asked on March 29, 2017
  23. Precalculus(NEED HELP ASAP PLEASE!!)

    PLEASE HELP!! sin(theta)= 1/3 pi/2 < theta < pi Find: cos(theta)= ______ ? tan(theta)= ______ ? cot(theta)= ______ ? sec(theta)= ______ ? csc(theta)= ______ ?

    asked on March 28, 2010
  24. Precalculus

    I have posted this question earlier as well but was unable to receive an answer. I don't know how to do this question at all, so PLEASE help me with this question and also show me the steps, so that I can learn. I would appreciate it a lot. A high sound

    asked on March 9, 2010
  25. Precalculus

    PLEASE HELP ME WITH THESE QUESTION AS MUCH AS POSSIBLE!! Evaluate without a calculator. Give exact answers: a) log(log(10)) = ? b) square root (log(100)) - log(square root(100)) = ? c) log((square root 10^3)(square root 10^5)(square root 10) = ? d)

    asked on March 1, 2010
  26. Precalculus

    Suppose f(x) = 3^x a) Find x where f(x) = 1/27. b) Estimate the value of x where f(x) = 24. So, a) f(x) = 3^x f(1/27) = 3^1/27 b) f(x) = 3^x f(24) = 3^24 Don't know how to solve them :( Please Help!!

    asked on February 10, 2010
  27. Precalculus

    State the domain of f(x) = x / x^2+4x+1

    asked on February 2, 2010
  28. math

    Explain why there does not exist a function whose domain is {-1,0,3} and whose range is {3,4,7,9}. PLEASE EXPLAIN!!

    asked on January 31, 2010
  29. Precalculus

    Show that sum of two even function with the same domain is an even function.

    asked on January 31, 2010
  30. math

    Express the function f(x) = −[ 1/3]x^2 + 2x + 3 in the form f(x) = a(x + p)^2 + q by completing the square: f(x) = −[ 1/3]x^2 + 2x + 3

    asked on January 28, 2010
  31. Precalculus

    NEED HELP!! Find all numbers t such that cos^-1 t = sin^-1 t.

    asked on April 11, 2010
  32. Precalculus

    Explain why there does not exist a point on the horizontal axis whose distance from (5,4) equals 3. HELP!!

    asked on March 10, 2010
  33. Math

    For the following, use the inverse relationship between logarithms and exponentials to determine x. log2(x^2−2x)=3 Solution Set:_____________? I don't know how to do this question at all :( Please help and show the work as well so that I can learn!

    asked on February 13, 2010
  34. math

    Express the function f(x) = −[ 1/3]x^2 + 2x + 3 in the form f(x) = a(x + p)^2 + q by completing the square: f(x) = −[ 1/3]x^2 + 2x + 3

    asked on January 28, 2010
  1. physics

    -5

    posted on July 26, 2018
  2. Social Studies

    thanks thanks

    posted on December 9, 2017
  3. English

    HAHAHAAH^^^^

    posted on December 5, 2017
  4. Environmental Science

    Jen is right

    posted on November 16, 2017
  5. math

    jf

    posted on October 5, 2016
  6. Math

    kajdhkajhdd

    posted on October 4, 2016
  7. operating system

    bjkm

    posted on June 6, 2016
  8. Math

    Let 'x' equal (2theta/3). If cot(x) = -sqrt3, then tan(x) = -1/sqrt3. Locating Tan(x) on the unit circle brings us pi/6. So, X=pi6 is the same as (2theta/3)=pi/6. Multiply both sides by 3. 2theta=pi/2. Multiply both sides by 1/2. Theta=pi/4.

    posted on February 9, 2016
  9. Physics

    no

    posted on June 6, 2015
  10. Management

    Uhm Management, a slew of your answers are incorrect - I mean more than half are

    posted on November 20, 2012
  11. Precalculus

    I got them :). Thank you so much for explaining it really well, my textbook doesn't explain well at all, that's why I was struggling!! Thank you once again!!

    posted on April 6, 2010
  12. Precalculus(NEED HELP ASAP PLEASE!!)

    So, tan(theta)=sin(theta)/cos(theta) cos(theta)=sin(theta)/tan(theta) =(1/sqrt(10))/(1/3) = 3/sqrt(10) ?? But its incorrect!! What am I doing wrong?

    posted on March 28, 2010
  13. Precalculus(NEED HELP ASAP PLEASE!!)

    Damon I don't understand you 2nd post but is the answer: 0, pi/2, pi, and 3 pi/2 ?? If it is.. then unfortunately its not the correct answer. Do you think you went wrong somewhere?

    posted on March 25, 2010
  14. Precalculus

    yes, these two points does equal to 15, but how did you find these points?

    posted on March 10, 2010
  15. Precalculus

    Yes, 1 is the answer. Thanks a lot for your help Reiny :)

    posted on March 9, 2010
  16. Precalculus

    This is an online assignment, we write the answer and the computer system recognizes whether the answer is right or wrong, but doesn't give any hint. See if this helps: The instructor gave us the formula 10log E/E0 and this question told us what EO is so

    posted on March 9, 2010
  17. Precalculus

    No unfortunately this is not the correct answer :(, is there any other way of doing this question?

    posted on March 9, 2010
  18. Precalculus

    Right, I was using the radius as 100, but got it now. Thanks!!

    posted on March 9, 2010
  19. Precalculus(NEED HELP ASAP PLEASE!!)

    So I get...... 10log(120/10^-12) = 140.7918125 But its incorrect :( what am I doing wrong ?

    posted on March 7, 2010
  20. math

    P=2l+2w (move 2w to the other side) -2w=2l-p 2w=2l+p w=2l+p/2 (make everything equal to w and cancel whatever is possible in this case 2) w = l+p (Final Answer) Hope this helps!!

    posted on March 3, 2010
  21. Precalculus

    Thank You so much MathMate, the answer you gave is right :)

    posted on February 7, 2010
  22. Precalculus

    The question didn't list h(x) that's what we are trying to figure out using the all the information above (1-3). If (x^2+1) is also a factor of h(x), then h(x) = ____________ ?

    posted on February 7, 2010
  23. Precalculus

    Sorry I don't understand y^2=-x^2 ?? Shouldn't it be:(y)(y)=(x)(-x) y^2 = -x ??

    posted on January 31, 2010
  24. Precalculus

    Thanks!!

    posted on January 31, 2010
  25. math

    Thank You :)

    posted on January 31, 2010
  26. Math

    f(0) = 0 is right f(-1) = 10 f(-1) = 5(-1)^2 - 5(-1) = 5(1) - (-5) = 5 + 5 = 10 f(2) = 10 f(2) = 5(2)^2 - 5(2) = 5(4) - 10 = 20 - 10 = 10 HOPE THIS HELPS!!

    posted on January 31, 2010
  27. math

    The Question makes no sense to me. Have you forgoten anything?

    posted on December 3, 2008