06/09/13

Does the Middle C have a longer or shorter wavelength in water than in air and why?
Middle C has a speed of 1500 m/s in water and 340 m/s in air.
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06/09/13

y varies inversely with the square of x
if y=45 when x=3, find y when x is 5  I need help solving this
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06/08/13

Find the volume?
Find the volume of the solid ball x^2+y^2+z^2<=1.
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06/08/13

finding the quadratic formula
What is the quadratic equation if the coordinate pairs are (1.7) (2,14) (3,28) (4,56)
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06/06/13

Compute the curl?
Let F(x, y) be the vector field ((x-y)/(x^2+y^2), (x+y)/(x^2+y^2)). Compute curl(F).
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06/06/13

Determine whether the line integral F*ds is path-independent?
Let R be the unit cube defined by 0<=x<=1, 0<=y<=1, 0<=z<=1, and let F(x, y, z)=(x+yz, y+xz, z+xy). Determine whether the line integral F*ds is path-independent.
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06/04/13

logarithms question
if logx y=0.7 and logx z=0.6 what is log x(yz)
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06/04/13

How many square miles are in one mile?
A person can see for a distance of 12 miles.  How many square miles can he see? Ok.  How many square miles are in one mile?
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06/03/13

Set up a triple integral?
Set up a triple integral that equals the volume of the intersection of the interior of two cylinders of radius a>0 whose axes intersect at a right angle. HINT: Take one of the cylinders to be:... more
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05/29/13

4X^2-8X+3=0
HLEP SDSDJK JHFKWD SLKQJK;SQK.JS
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05/29/13

probability question- In a proposed business venture, a businesswoman estimated there is a 55 percent chance that she will make $61000 and a 45 percent chance t
In a proposed business venture, a businesswoman estimated there is a 55 percent chance that she will make $61000 and a 45 percent chance that she will lose $66,000. Determine her expected value.  
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05/29/13

What is the absolute value of -5-3i
making absolute value of a complex number Chapter 4.6
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05/28/13

Find the directional derivative?
Find the directional derivative of f(x, y)=xye^(-xy^2) at the point (1, 1) in the direction <2/sqrt(5), 1/sqrt(5)>. f=<ye^(-y^2), xe^(-2xy)> f(1, 1)=<e, e^-2> u=<2/sqrt(5),... more
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05/28/13

Completing the square
Why can't you factor a quadratic function completely all the time instead of completing the square.
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05/26/13

Find y"(0) and y'''(0)?
Let y(t) be a function which satisfies the differential equation y"(t)+(1+t)y'(t)+(1+t+t^2)y(t)=0, y(0)=1, y'(0)=0. Find y"(0) and y'''(0).
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05/25/13

college algebra
a boat travels 3km upstream and 3km back. the time for the round trip is 8 hours. the speed. the speed of the stream is 3km/hr. what is the speed of the boat in still water?simplify your answer,... more
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05/24/13

Write an equation for the tangent plane?
If f(0, -2)=4 and gradient f(0, -2)=<4/5, 12/25>, write an equation for the tangent plane to the surface z=f(x, y) at this point.
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05/24/13

Please evaluate this hard derivative?
Evaluate (d^100/(dx^95 dy^2 dx^3))((y)(e^x)(x)+cos(x)). The answer is 0 but I just seem to get super confused with this problem. Please show the work step by step so I won't get lost. I've work on... more
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05/24/13

Consider the function f(x, y)=y^2-x^2-yx^3.
b) Find the equation of the tangent plane to the graph of z=f(x, y) at the point (1, -1, 1). c) Compute the directional derivative of f at the point (1, -1) in the direction of <3, 1>.
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05/23/13

(2+i)x+(3+2i)y=3
Find the value of X and Y  
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05/22/13

Please compute this?
Consider the function f(x, y)=y^2-x^2-yx^3. Compute f(1, -1). There's a triangle in front of f(1, -1), an opposite triangle.
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05/22/13

A pitcher contained 5g-2 gallons of water. Water was then poured from the pitcher into a glass that has a capacity of (g-5)gallons how many gallons of water ar
A pitcher contained 5g-2 gallons of water. Water was then poured from the pitcher into a glass that has a capacity of (g-5)gallons how many gallons of water are left in the pitcher?
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05/22/13

Find the equation of the plane?
If the vector function r(t)=<t+2, 2t^2-t+1, 3+t-t^3> is at the point (2, 1, 3) tangent to the plane containing the vector function s(u)=<u^2+2, -u+1, 2u^2-u+3>, find the equation of the... more
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05/21/13

Which of the following is equivalent to 5+i/1+3i
A. 4-8i/5 B. 4-7i/5 C. 1-7i/5 D. -1-7i/4
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05/20/13

What should the dimensions of her pasture be?
) A rancher needs to enclose three sides of a rectangular pasture. If she has 100 yards of fence and needs to enclose 1050 sq. yds., what should the dimensions of her pasture be?
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