Surface Area A satellite signal receiving dish is formed by revolving the parabola given by x 2 = 20 y about the y-axis. The radius of the dish is r feet. Verify that the surface area of the dish is given by 2 π ∫ 0 t x 1 + ( x 10 ) 2 d x = π 15 [ ( 100 + r 2 ) 3 / 2 − 1000 ]
Surface Area A satellite signal receiving dish is formed by revolving the parabola given by x 2 = 20 y about the y-axis. The radius of the dish is r feet. Verify that the surface area of the dish is given by 2 π ∫ 0 t x 1 + ( x 10 ) 2 d x = π 15 [ ( 100 + r 2 ) 3 / 2 − 1000 ]
Solution Summary: The author explains how a spherical dish of radius r is formed by revolving the parabola around y axis.
Consider the following system of equations, Ax=b :
x+2y+3z - w = 2
2x4z2w = 3
-x+6y+17z7w = 0
-9x-2y+13z7w = -14
a. Find the solution to the system. Write it as a parametric equation. You can use a
computer to do the row reduction.
b. What is a geometric description of the solution? Explain how you know.
c. Write the solution in vector form?
d. What is the solution to the homogeneous system, Ax=0?
2. Find a matrix A with the following qualities
a. A is 3 x 3.
b. The matrix A is not lower triangular and is not upper triangular.
c. At least one value in each row is not a 1, 2,-1, -2, or 0
d. A is invertible.
Find the exact area inside r=2sin(2\theta ) and outside r=\sqrt(3)
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