08/25/13

Gas Stoichiometry Question
Air is 21.0% by volume oxygen molecules, and C3H8 produces CO2 and H2O on combustion. What volume of air at 1.01 atm and 20.0 degrees Celsius would be required to burn 38.8 kg of propane (C3H8)?
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08/20/13

Find the Laplace transform?
Find the Laplace transform of f(t)=∫ e^(-(t-torque)) sin torque d*torque from 0 to t. What's the first function? I know that the second function is sin(t).
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08/17/13

Find the inverse Laplace transform?
For e^(-10s)/(s(s^2+3s+2)). The answer is u10(t)[(1/2)+(1/2)e^(-2(t-10))-e^(-(t-10))]
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08/14/13

Find the inverse Laplace transform?
e^-5s/(s^2+3s+2)+e^-10s/(s(s^2+3s+2))+(1/2)/(s^2+3s+2) How do you find the inverse laplace transform? Please help.
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07/06/13

Solve the differential equation?
Solve the differential equation y dx+(2xy-e^(-2y))dy=0.
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07/05/13

complex numbers equation derivation
How is the expansion of the square of |z1+z2| derived?
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06/30/13

Find the coordinates?
Consider the initial value problem: y'+(1/2)y=2cos(t), y(0)=-1. Find the coordinates of the first local maximum point of the solution for t>0.
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06/28/13

Complete the identity: csc(t)(sin(t) + cos(t)) = ?
Complete the identity: csc(t)(sin(t) + cos(t)) = ?
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06/08/13

Find dz/dx?
The equation x-z=arctan(yz) defines z implicitly as a function of x and y. Find dz/dx. 1-dz/dx=(1/(1+(yz)^2))*y*dz/dx How do I leave dz/dx by itself? Show me step by step.
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06/08/13

Find the area of the domain D which is in the first quadrant?
Find the area of the domain D which is in the first quadrant and bounded by xy=1, xy=3, y=x, y=3x.
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05/24/13

What are the answers to -4+sin(x)=-8+sqrt2/2
I need to know how to find the two answers between 0 and 2 pi. I need the answers in degrees, not radians. there should be two answers
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05/18/13

Please evaluate this?
Evaluate (d^100/(dx^95 dy^2 dx^3))(ye^x(x)+cos(x)).
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05/11/13

Find the normal vector to the plane?
Find the normal vector to the plane 3x+2y+6z=6.
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05/08/13

A tepee with a dirt floor in the shape of a right cone has a slant height of
A tepee with a dirt floor in the shape of a right cone has a slant height of 26 feet and a radius of 12.5 feet. Approximately how much canvas would be needed to cover the tepee?
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04/28/13

ind all solutions for Sin^2x - 2sinx - 3 = 0 on the interval [0 , 2pi )
find all solutions forSin^2x - 2sinx - 3 = 0 on the interval [0 , 2pi )
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04/13/13

Use Stokes' Theorem to evaluate the surface integral?
Use Stokes' Theorem to evaluate the surface integral where F=<zx^2, z(e^xy^2)-x, x*ln (y^2)> and where S is the portion of z=1-x^2-y^2 above the xy-plane with n upward. Answer:... more
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04/13/13

question about a logarithmic funtion using only variables
what is the answer to this problem... abcx+d +k = h
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04/12/13

int(sec(x)+tan(x))dx
find integration by subtutitions.
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04/11/13

Find the equation of the ellipse?
A skating park has a track shaped like an ellipse. If the length of the track is 90 m and the width of the track is 40 m, find the equation of the ellipse.
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04/11/13

I need help finding the equation of the curve which satisfies this differential equation: 2*x*y*(dx/dy)=(x^2)+1 passing through (1,2)
Any chance you can help me with this, I need help finding the equation of the curve which satisfies this differential equation: 2*x*y*(dx/dy)=(x^2)+1 and it passes though the point (1,2)
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04/08/13

Find the perimeter and area of the regular polygon, centered at o.
It is a hexagon and the area given is 16 times the square root of 3
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04/08/13

cos2(x)-cos6(x)=0
find the solutions of the equation in the interval [0, 2pi)
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04/08/13

Calculate to the nearest cent the future value of an investment of 40000 at 1%/year compounded anually after 11 year
i dony know how to show it anually
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04/07/13

Help with function tables
Each question you have to find the equation. QUESTION 1: IN : 6, -7, 8, 9, -3            OUT : -20, 6, -24, -26, -2 QUESTION 2:IN : -7, -5, -9, -4, 1          OUT : -17, -13, -21, -11, -1  
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04/06/13

Compute the linear approximation?
Compute the linear approximation of f(x, y)=sqrt(x^2+y^2) at (3, 0). Answer: L(x, y)=x
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