The letters r and ? represent polar coordinates. Write the equation using rectangular coordinates (x, y).r = 10 sin ?
A. 
= 10y
B. x2 + y2 = 10x
C. 
= 10x
D. x2 + y2 = 10y
Answer: D
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Find the volume of the solid generated by revolving the region about the given line.The region in the first quadrant bounded above by the line y = 6, below by the line y = 
, and on the left by the y-axis, about the line y = 6
A. 50? B. 420? C. 60? D. 30?
Provide an appropriate response.Solve the compound inequality: 2 ? x - 1 ? 7
A. x ? 3 or x ? 8 B. 1 ? x ? 6 C. 3 ? x ? 8 D. 2 ? x ? 8
Solve the system of equations. If the system has no solution, say that it is inconsistent.
A. x = 0, y = 0, z = -4; (0, 0, -4) B. x = 0, y = -4, z = 0; (0, -4, 0) C. x = 2, y = -4, z = 0; (2, -4, 0) D. inconsistent
Find an equation of the parabola described.Focus at (5, 0); vertex at (0, 0)
A. y2 = 20x B. x = 20y2 C. y = 20x2 D. x2 = 20y