Replace the polar equation with an equivalent Cartesian equation. r = 32 sin ?
A. x2 + (y - 16)2 = 256
B. x2 + (y - 32)2 = 256
C. (x - 16)2 + y2 = 256
D. y = 32
Answer: A
Mathematics
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A. x > -3
B. x ? -3
C. x ? -3
D. x < -3
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Use scientific notation to solve the problem.A computer can do one calculation in 1.4 x 10-7 seconds. How long would it take the computer to do a trillion (1012) calculations?
A. 1.4 x 10-7 sec B. 1.4 x 1012 sec C. 1.4 x 105 sec D. 1.4 x 106 sec
Mathematics
Solve the system of equations by Gaussian elimination. If there is an unlimited number of solutions, find two of them.x + y = 3x - y = -2
A. x = 
, y = - 1
B. Inconsistent
C. x = 
, y = 
D. x = 
, y = 
Mathematics
Find the directrices of the ellipse.16x2 + 4y2 = 64
A. y = ± 
B. x = ± 
C. x = ± 
D. y = ± 
Mathematics