The radius of a spherical balloon is increasing at a rate of 4 centimeters per minute. How fast is the surface area changing when the radius is 14 centimeters? Hint: The surface area is S=4πr2. Rate of change of surface area

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Chapter61: Areas Of Circles, Sectors, And Segments
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Problem 24A: A piece shown by the shaded portion is to be cut from a square plate 128 millimeters on a side. a....
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The radius of a spherical balloon is increasing at a rate of 4 centimeters per minute. How fast is the surface area changing when the radius is 14 centimeters?
Hint: The surface area is S=4πr2.

Rate of change of surface area =

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