Solve the problem.The radius of a sphere is given by the formula 
, where S is the surface area. If the surface area is 93 square inches, what is the radius? Use 3.14 for ?, and round your answer to the nearest tenth of an inch.
A. 8.5 in.
B. 2.7 in.
C. 0.4 in.
D. 4.8 in.
Answer: B
Mathematics
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Solve the problem.Find an equation for the level curve of the function f(x, y) = 100 - x2 - y2 that passes through the point 
.
A. x2 + y2 = 108 B. x2 - y2 = 8 C. x2 + y2 = 8 D. x2 + y2 = - 8
Mathematics
Find the limit of the sequence or state that it diverges.
A. diverges B. 0 C. -1 D. 1
Mathematics
Sketch the graph of the function.y = xe-x/2
A. 
B. 
C. 
D. 
Mathematics
Verify the identity.
= cot ? - cot ?
What will be an ideal response?
Mathematics