Solve the problem.A balloon used in surgical procedures is cylindrical in shape. As it expands outward, assume that the length remains a constant 60.0 mm. Find the rate of change of surface area with respect to radius when the radius is 0
mm. The surface area is given by the formula 
where l is the length and r is the radius. (Answer can be left in terms of ?).
A. 60.28? mm2/mm
B. 60.14? mm2/mm
C. 120.0? mm2/mm
D. 120.28? mm2/mm
Answer: D
Mathematics
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A. ln [
+ 
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