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

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

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

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?

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

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)

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!!

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

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)= ____?

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!!

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.

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).

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

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

16. Precalculus

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

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

18. Precalculus

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

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!!

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

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.

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

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

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

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)

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!!

27. Precalculus

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

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!!

29. Precalculus

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

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

31. Precalculus

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

32. Precalculus

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

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!

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

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

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

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

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