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Adjust the slider to illustrate the following related rates problem: If a snowball melts so that its surface area decreases at a rate of 1

, find the rate at which the diameter decreases when the diameter is 10

Problem from James Stewart, Calculus: Early Transcendentals, 4th ed., 1999, Page 257, #6.

Contributed by: Cindy Piao and Karen Ye (Torrey Pines High School)

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A Snowball's Rate of Change