Friday
October 31, 2014

Posts by Alaina


Total # Posts: 31

Physics 2
Rearrange this equation to make b the subject and then, by replacing each term of the equation by its SI base units, express the units of b in SI base units. Eph=hct ___ b
January 2, 2014

physics
An swimmer of mass m is at a swimming pool. She climbs the steps to the diving board 4.0 m above the water. She jumps off the board, which enables her to rise a further 0.7 m before she begins her descent into the pool. At what speed does she enter the water? Due 5 jan 2013
January 2, 2014

Calculus-Check please?
Fabio stands atop his 16 foot ladder when he realizes that the ladder is slipping down the side of the building. He decides that the base of the ladder is moving away from the bottom of the building at a rate of 2 feet per second when it is 3 feet from the bottom of the ...
May 6, 2013

Derivatives
Oops I meant 4x^3 + x^2 - 12x + 1/ ((x^2+1)^3)
May 6, 2013

Derivatives
I have gotten so many different responses from mine on this question Can someone PLEASE write out the steps for me for this. Thanks f'(x)= 2x/(x^2+1) Find the second derivative. I get 4x^3 + x^2- 12x + 1
May 6, 2013

Asympotes, Data?-Bump
Thank you so much! I see what I should have done now. :P
May 5, 2013

Asympotes, Data?-Bump
If someone could help me on this, I'd appreciate it. f(x)= 2x/(x^2+1) Vertical: none Horizontal: none Minimum: x=-1 Maximum: x=1 Inflection Points: it seems like there are one or two, but i don't know how to factor f''(x)= 4x^3 + x^2 - 12x + 1 :/
May 5, 2013

Asympotes, Data?-Bump
Can someone help me with this? I have already solved it. Thank you.
May 4, 2013

Asympotes, Data?
f(x)= 2x/(x^2+1) Vertical: none Horizontal: none Minimum: x=-1 Maximum: x=1 Inflection Points: it seems like there are one or two, but i don't know how to factor f''(x)= 4x^3 + x^2 - 12x + 1 :/
May 4, 2013

Calculus-Solved - Incorrect
k(z)= 4z^4 - z(z+10)/((1+z)^2) derivative? 16z^3 + (3z^3 + 26z^2 + 42z + 10)/((1+z)^4) this is wrong though ^
May 4, 2013

Calculus-Solved - Incorrect
calculate delta y for f(x)= x^(3/2) with x= 4 and delta x= dx=0.1 delta y= f(x+delta x)- f(x) = f(4.1) - f(4) delta y= f(4.1)-8 f(x + delta x)= 8 + 3/2*x^(1/2)*0.1 = 8 + 0.15x^(1/2) = 8 + 0.30 = 8.30 delta y= 8.30 - 8 delta y= 0.30 but this is wrong. why is it wrong?
May 4, 2013

Calculus-Solved-Why is this wrong?
The Chain Rule- of course! Thank you very much Steve. :-)
May 4, 2013

Calculus-Solved-Why is this wrong?
use differentials to approximate the change in f(x) if x changes from 3 to 3.01 and f(x) = (3x^2-26)^10 derivative: 10(3x^2-26)^9 f(x+ delta x)= 1 + 10(3x^2-26)^9 * 0.01 = 1 + 10(0.01) <-- Substitute 3 for x = 1 + 0.1 = 1.1 delta y= 1.1 - 1 delta y= 0.1 but 0.1 is incorrect...
May 4, 2013

Calculus-Solved
This is also what I entered, yet it is wrong
May 4, 2013

Calculus-Solved
this is wrong. but can you explain how to correct it? thanks use differential of x^-1/3 to approximate solution to (1/cube root(7.952)) differential: df= -1/3(x^(-4/3)) * dx df= -1/48 * 0.0048 df= -0.001 0.500 - 0.001 = 0.499 but this is wrong.
May 4, 2013

math
need to know how to find the distrbutive property of 50x62,159= (50x )+(50x )+(50x100)+(50x50)+(50x9)
March 28, 2013

physics
if a bowling ball with a 22 cm diameter is half way submerged in a bucket of water, what is its mass?
July 12, 2011

math
What are the corner points for the feasible region given on the right? gg
April 18, 2011

trig
verify the identity. cos2 x - sin2 x = 1 - 2sin2 x the 2's next to the sin and cos on the right sides are powers.
February 15, 2011

Math
Liana has two toy planes. The first plane is on a string that is 12 feet long. The second plane can go in a circle that has a diameter of 22 feet. Which plane can make a larger circle in the air? Explain.
January 25, 2011

Physics
A loaded penguin sled weighing 81 N rests on a plane inclined at angle θ = 21° to the horizontal (Fig. 6-23). Between the sled and the plane, the coefficient of static friction is 0.24, and the coefficient of kinetic friction is 0.13. (a) What is the minimum magnitude...
October 10, 2010

Physics
The two blocks (m = 13 kg and M = 89 kg) are not attached to each other. The coefficient of static friction between the blocks is μs = 0.50, but the surface beneath the larger block is frictionless. What is the minimum magnitude of the horizontal force (F) required to ...
October 10, 2010

business
Write a four paragraph answer, citing the text, to – Would you be willing to pay $500 today in exchange for $10,000 in 30 years? What would be the key considerations in answering yes or no? Would your answer depend on who is making the promise to repay? For purpose of ...
June 22, 2010

business
Analyze the following scenario: Duncombe Village Golf Course is considering the purchase of new equipment that will cost $1,200,000 if purchased today and will generate the following cash disbursements and receipts. Should Duncombe pursue the investment if the cost of capital ...
June 22, 2010

Geometry
If you have only 500 sq. feet of material and have to built a swimming pool, which shape will hold the most water. A cylinder, a cube or a rectangular prisim?
February 10, 2010

Algebra
Please help. I have tried many times to come up with something after reading the material but I am completely stumped. A cubic container, with sides of length, x inches, has a volume equal to x^3 cubic inches. The height of the container was decreased and the length was ...
November 21, 2009

maths
perpendicular lines have opposite sign and reciprocal slopes from the original line you are given. put the first equation into proper form y= (-2x/3)+(5/3) the slope in this case is -2/3 Therefor a perpendicular line will have the slope 3/2.
June 6, 2008

integrated algebra
x-5 x+5 ___ = ___ 4 x+2 First you want to cross multiply (x-5)(x+2) = 4(x+5) Then use FOIL on the left hand side, and distribute the 4 on the right hand side to get X(squared)-3x -10 on the left = 4x+20 on the right subtract the 4x+20 on the right and left side you get x(...
June 5, 2008

Math
Find the area of each circle use 22/7 for pie. 1. r=14ft 2.d=3 1/3 yd
January 7, 2008

string theory
what is the string theory?
November 28, 2007

math
whatsz 4(x+5.1)-5x It is an algebraic expression.
May 29, 2007

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