# Posts by JH

Total # Posts: 58

**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 force is the biceps ...

*March 29, 2017*

**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?

*September 21, 2016*

**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 molarity idek.

*March 27, 2015*

**Math**

kajdhkajhdd

*October 25, 2014*

**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. <<done

*September 29, 2014*

**Management**

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

*May 17, 2012*

**Precalculus**

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

*April 11, 2010*

**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!!

*April 6, 2010*

**Precalculus**

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

*April 6, 2010*

**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?

*March 28, 2010*

**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!!

*March 28, 2010*

**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)= _____ ?

*March 28, 2010*

**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)= ______ ?

*March 28, 2010*

**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?

*March 25, 2010*

**Precalculus(NEED HELP ASAP PLEASE!!)**

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

*March 25, 2010*

**Precalculus(NEED HELP ASAP PLEASE!!)**

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

*March 25, 2010*

**Precalculus**

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

*March 22, 2010*

**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!!

*March 10, 2010*

**Precalculus**

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

*March 10, 2010*

**Precalculus**

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

*March 9, 2010*

**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!!

*March 9, 2010*

**Precalculus**

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

*March 9, 2010*

**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 we just plugged it...

*March 9, 2010*

**Precalculus**

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

*March 9, 2010*

**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 level of 120 dB is ...

*March 9, 2010*

**Precalculus**

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

*March 9, 2010*

**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 find a)the equation ...

*March 9, 2010*

**Precalculus(NEED HELP ASAP PLEASE!!)**

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

*March 7, 2010*

**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.

*March 7, 2010*

**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 savings account after 3 ...

*March 4, 2010*

**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 about _____ ? c) The ...

*March 4, 2010*

**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.

*March 3, 2010*

**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!!

*March 3, 2010*

**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).

*March 3, 2010*

**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) 1000^log(3) = ? e) log(1/log...

*March 1, 2010*

**Math**

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

*February 14, 2010*

**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! Thanks.

*February 13, 2010*

**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!!

*February 10, 2010*

**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 that the degree ...

*February 7, 2010*

**Precalculus**

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

*February 7, 2010*

**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) = ____________ ?

*February 7, 2010*

**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 coefficient of the ...

*February 7, 2010*

**Precalculus**

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

*February 2, 2010*

**Precalculus**

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

*January 31, 2010*

**Precalculus**

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

*January 31, 2010*

**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)

*January 31, 2010*

**Precalculus**

Thanks!!

*January 31, 2010*

**Precalculus**

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

*January 31, 2010*

**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!!

*January 31, 2010*

**math**

Thank You :)

*January 31, 2010*

**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!!

*January 31, 2010*

**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

*January 28, 2010*

**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

*January 28, 2010*

**operating system**

bjkm

*October 14, 2009*

**math**

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

*December 2, 2008*

**science (chem)**

lol

*June 22, 2007*

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