# Posts by JH

Total # Posts: 60

Environmental Science
Jen is right

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 ...

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?

Social Studies
thanks thanks

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.

Math
kajdhkajhdd

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

English
HAHAHAAH^^^^

Physics
no

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

math
jf

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

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!!

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

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?

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!!

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)= _____ ?

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)= ______ ?

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?

Precalculus(NEED HELP ASAP PLEASE!!)
Solve: sin(theta)+cos(theta) = 1 0 < or equal to theta < 2pi Solution Set:__________ ?

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

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

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!!

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

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

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!!

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

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...

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

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 ...

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

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 ...

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

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.

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 ...

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 ...

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.

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!!

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).

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...

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

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.

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!!

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 ...

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

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) = ____________ ?

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 ...

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

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

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

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)

Precalculus
Thanks!!

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

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!!

math
Thank You :)

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!!

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

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

operating system
bjkm

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