Solve the problem.A radio telescope has a parabolic surface. If it is 9 m deep and 
wide, how far is the focus from the vertex?A = 12 mB = 9 m
A. 1 m
B. 9 m
C. 4 m
D. 3 m
Answer: A
Mathematics
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Use the Comparison Test to determine whether the improper integral converges or diverges.
A. converges B. diverges
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Solve the equation by the zero-factor property.x(2x + 10) = 0
A. 
B. 
C. {0, 5}
D. {0, -5}
Mathematics
Suppose that the functions f and g and their derivatives with respect to x have the following values at the given values of x. Find the derivative with respect to x of the given combination at the given value of x.
g(x + f(x)), x = 3
A. -32 B. -4 C. -36 D. 27
Mathematics
Determine whether the following is a probability model.
A. Yes B. No
Mathematics