Find the center and radius of the circle with the given equation. x2 + 8x + 16 + (y + 9)2 = 81
A. Center (4, 9), r = 81
B. Center (-9, -4), r = 9
C. Center (-4, -9), r = 9
D. Center (9, 4), r = 81
Answer: C
Mathematics
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, using the indicated point in the kth subinterval for ck.f(x) = -4x2, [0, 4], midpoint
A. 
B. 
C. 
D. 
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Mathematics