Solve the problem. Round your answer, if appropriate.The volume of a sphere is increasing at a rate of 6 cm3/sec. Find the rate of change of its surface area when its volume is 
cm3. (Do not round your answer.)
A. 12? cm2/sec
B. 
cm2/sec
C. 8 cm2/sec
D. 12 cm2/sec
Answer: D
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Write down the meaning of the given equation.y = cot-1 8x
A. y is the angle whose cotangent is x. B. y is the angle whose tangent is 8x. C. x is the angle whose cotangent is 8y. D. y is the angle whose cotangent is 8x.
Solve the problem.Determine whether (-2, -1, 5) is a solution of the system x - y + z = 4 2x - 8y - 3z = 24 3x + 4y + 2z = 7.
A. No B. Yes
A delivery truck must deliver packages to 6 different store locations (A, B, C, D, E, and F). The trip must start and end at C. The graph below shows the distances (in miles) between locations. We want to minimize the total distance traveled.
The repetitive nearest-neighbor tour starting with vertex C is given by:
A. C, D, E, F, A, B, C. B. C, A, B, D, F, E, C. C. C, A, E, F, B, D, C. D. C, B, D, F, E, A, C. E. none of these
Simplify the complex rational expression using either Method I or Method II.
A. 
B. 
C. 
D. 