Divide.
A. 51
B. 56
C. 55
D. 53
Answer: D
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Solve the problem.Find the center of mass of the region of constant density bounded from above by the sphere 
and from below by the cone 
A. 
= 0, 
= 0, 
= 
(2 + 
)
B. 
= 0, 
= 0, 
= 
(2 + 
)
C. 
= 0, 
= 0, 
= 
(2 + 
)
D. 
= 0, 
= 0, 
= 
(2 + 
)
Use a half-angle identity to find an exact value for the following, given the information about x. Find cos x given that cos 2x = 
and 0 ? 2x < 
.
A. cos x = 7
B. cos x = 
C. cos x = 
D. cos x = 
Solve the problem.Find the center of mass of a thin triangular plate bounded by the coordinate axes and the line 
if 
.
A. 
= 
, 
= 
B. 
= 
, y = 
C. 
= 
, 
= 
D. 
= 
, 
= 
Factor.500x3 + 4y3
A. 4(5x + y)(25x2 - 5xy + y2) B. (5x - 4y)(100x2 + 5y + y2) C. 4(5x - y)(25x2 + 5xy + y2) D. 4(5x - y)(25x2 + y2)