Solve the problem. Round your answer, if appropriate.The radius of a right circular cylinder is increasing at the rate of 
, while the height is decreasing at the rate of 
. At what rate is the volume of the cylinder changing when the radius is 20 in. and the height is 16 in.?
A. -160? in.3/sec
B. 2080? in.3/sec
C. -160 in.3/sec
D. -104 in.3/sec
Answer: B
Mathematics
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Find the foci of the given hyperbola.y2 - 4x2 = 4
A. (0, 2), (0, -2)
B. (
, 0), (-
, 0)
C. (0, 
), (0, -
)
D. (2, 0), (-2, 0)
Mathematics
Simplify the expression by performing the indicated operations.
? 
+ 
? 
A. 6
B. 7
C. 36
D. 15
Mathematics
Find the indicated intercept(s) of the graph of the function.x-intercepts of f(x) = 
A. (-3, 0), (4, 0) B. (-4, 0), (3, 0) C. (5, 0) D. none
Mathematics
Find the center of mass of the particles with the given masses located at the given points.11 at (-2.9, 0), 17 at (4.6, 0), 31 at (6.9, 0)
A. 
= 6.9, 
= 0
B. 
= 30, 
= 0
C. 
= 4.4, 
= 0
D. 
= 1.1, 
= 0
Mathematics