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Calculus1 9 Online
OpenStudy (anonymous):

If a snowball melts so that its surface area decreases at a rate of 1cm2/min, find the rate at which the diameter decreases when the diameter is 10cm. Note: The problem says diameter and not radius and wants the positive version of the rate, for some reason.

OpenStudy (isaiah.feynman):

|dw:1415134030540:dw|

OpenStudy (isaiah.feynman):

We assume the snowball is a perfect sphere. Then we use the formula for the surface area of a sphere..|dw:1415134126520:dw|

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