Solve for the indicated variable.M = ?r2hd, for r
A. r = 
B. r = 
C. r = ±
D. r = 
Answer: D
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Find the volume of the described solid.The base of a solid is the region between the curve y = 5cos x and the x-axis from x = 0 to x = ?/2. The cross sections perpendicular to the x-axis are squares with diagonals running from the x-axis to the curve.
A. 
?
B. 
?
C. 6?
D. 
?
Solve.
x - 
= -4
A. x = 17 B. x = -17 C. x = -15 D. x = 15
Convert the angle between radian and degree measures. Express radians in terms of ? and round degrees to two decimals, when necessary.- 
A. -30° B. -60° C. -40° D. -120°
Use transformations to help describe the differences and the similarities in the graphs of the quadratic functions. Verify using a graphing calculator.y = 2x2, y = 2(x + 3)2
A. The graph y = 2(x + 3)2 is shifted horizontally 3 units to the right of y = 2x2. B. The graph y = 2(x + 3)2 is shifted vertically 3 units below y = 2x2. C. The graph y = 2(x + 3)2 is shifted horizontally 3 units to the left of y = 2x2. D. The graph y = 2(x + 3)2 is shifted vertically 3 units above y = 2x2.