05/07/15

Calculus (Integration)
∫ln(x) sin-1x dx
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04/25/15

please help with stats question
Suppose that X~ B(12,p) and consider the point estimate,   p-hat = X/14   a) What is the bias of this point estimate? b) What is the variance of this point estimate? c) Show that this point... more
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04/21/15

Comparisons Between Means and Correlations
Two samples of 21 men each are brought into a room and told they are to help another person in the next room learn a simple problem by giving him an electric shock as a punishment for wrong... more
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04/19/15

Use linear approximation and differential to approximate : 14^(1/4)
Use linear approximation and differential toto approximate : 14^(1/4)
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03/29/15

Moment of inertia question
The boundary of a thin plate is an ellipse with semiaxes a and b.Let L denote a line in the plane of the plate passing through the center of the ellipse and making an angle k with the axis of... more
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07/15/14

Can anyone please recommend me a good textbook for Linear Algebra?
Can anyone please recommend me a good textbook for Linear Algebra that has lots of practice problems and less theoretical problems? 
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04/25/14

solve. What does w equal
log7(w2)+2log7(5w)=2
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03/25/14

probability Question
 You have a four sided die with 1, 2, 3, 4 spots.  What is the sample space when we count the total sum number of spots on the bottom face for rolling the die twice (spots on the first and second... more
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02/23/14

sin(x-6)=cos(3x-4)
solve for x
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02/23/14

Calculus - Continuity Problem
the problem is let F(x) = ((x3 - B) / (x-2)) if X<0 , Ax+B if 0<x<4 , 2x2 if x>4  I have to find both A ad B which make it continuous...
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02/22/14

statistics
Tell if each variable is continuous or discrete.a. Tonnage carried by an oil tanker at sea.b. Wind velocity at 7 o’clock this morning.c. Number of text messages you received yesterday.
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02/22/14

statistics
Which data type (categorical, numerical) is each of the following and what is its level of measurement (nominal, ordinal, interval, ratio)?a. Your current credit card balance.b. Your college... more
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02/12/14

Find the integral?
Find the integral of sqrt(4-x^2)dx from 0 to 2.   Answer: pi   Please show all your work.
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01/08/14

How do you find the perimeter of a rectangle/square when you have the area of circles inside of it?
I am stuck on a problem. There is a rectangle and four circles enclosed inside of it.  Thee problem gives me the area of the circles, but I do not know how to solve this problem based on this... more
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01/05/14

the ecentricity of the ellipse 4x^2+y^2-8x+2y+4
the eccentricity of the ellipse 4x2+y2-8x+2y+4
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01/04/14

Find f(e^-1).
If f is the solution of x*f'(x)-f(x)=x such that f(-1)=1, find f(e^-1).   Answer: -2e^-1    
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01/03/14

Did I solve factoring with a zero product property correctly
Did I solve this problem correctly by using factoring and the zero-product property?   z(z - 1)(z + 3) = 0   step 1   z( z - 1) = 0     or  z( z + 3) = step 2   z( z) = 1              (z) z -... more
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01/02/14

Find the integral?
If ∫ f(x-c) dx from 1 to 2=5 where c is a constant, find ∫ f(x) dx from 1-c to 2-c.   Answer: 5    
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12/31/13

Use the sum or difference formulas to determine: A. sin105 degrees B. tan15 degrees
This is for my trig class. Thanks for the help!
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12/31/13

Simplify sec^2x + csc^2x / csc^2x(1+tan^2x)
This is for my trig class. Thanks for the help!
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12/31/13

Find the value of the other five trigonometric functions, given tanx= 4/11, secx<0.
This is for my trig class, thanks for the help!
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12/29/13

Find the set of values?
If f(x)=x+1/x, find the set of values for which f increases.   Answer: (-∞, -1]U[1, ∞)   I know that f'(x)=1-1/x^2=0 and x=1, -1. But what to do next?
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12/28/13

Is a number between?
If f(x)=8-x^2 for -2≤x≤2, f(x)=x^2 elsewhere, then ∫ f(x) dx from -1 to 3 is a number between?   a) 0 and 8 b) 8 and 16 c) 16 and 24 d) 24 and 32 e) 32 and 40   Answer: D
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12/28/13

What's f(x)?
If ∫ x^2*cos x dx=f(x)-∫ 2x sin x dx, what's f(x)?   Answer: x^2*sin x+C    
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12/22/13

The point on the curve?
The point on the curve x^2+2y=0 that is nearest the point (0, -1/2) occurs where y is?   Answer: 0
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