Write the standard form of the equation of the circle with the given center and radius.Center (0, 0), r = 5
A. x2 - y2 = 5
B. x2 + y2 = 25
C. x2 + y2 = 5
D. x2 + y2 = 10
Answer: B
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Use a spherical coordinate integral to find the volume of the given solid.the solid enclosed by the cardioid of revolution 
A. 
?
B. 
?
C. 
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D. 
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Solve the problem.Suppose that the velocity of a falling body is v = 
(k a constant) at the instant the body has fallen s meters from its starting point. Find the body's acceleration as a function of s.
A. a = - 
B. a = 
C. a = - 
D. a = - 
Determine the largest open intervals of the domain over which the function is increasing, decreasing, and constant.
A. Increasing (2, ?); Decreasing (-?, -2) B. Increasing never; Decreasing (-?, -2) ? (2, ?) C. Increasing (-?, -2) ? (2, ?); Decreasing never D. Increasing (-2, 2); Decreasing (-?, -2) ? (2, ?)
For the pair of functions, find the indicated composition.f(x) = 
x, g(x) = - 
xFind (f ? g)(x).
A. 0 B. -x C. 1 D. x