Determine whether the given quadratic function has a minimum value or maximum value. Then find the coordinates of the minimum or maximum point.f(x) = -4x2 + 4x
A. minimum; 
B. minimum; 
C. maximum; 
D. maximum; 
Answer: C
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Answer the question or solve the problem.If a ? b, is it always true that -9a ? -9b? Explain.
What will be an ideal response?
Factor completely.p2qr + 8pqr - 48qr
A. qr(p + 12)(p - 4) B. (pqr - 48)(p + qr) C. (pqr + 12)(p - 4qr) D. qr(p - 12)(p + 4)
Rewrite the number or expression as requested.3,836,000,000 (Rewrite in scientific notation.)
A. 383.6 ? 107 B. 3.836 ? 106 C. 3836 ? 10-6 D. 3.836 ? 109
Solve the problem.A stone is thrown into a pond. A circular ripple is spreading over the pond in such a way that the radius is increasing at the rate of 4.2 feet per second. Find a function, r(t), for the radius in terms of t. Find a function, A(r), for the area of the ripple in terms of r. 
A. (A ? r)(t) = 8.4?t2 B. (A ? r)(t) = 17.64?t2 C. (A ? r)(t) = 17.64?2t D. (A ? r)(t) = 4.2?t2