2.99
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If a snowball melts so that its surface area decreases at a rate of 1 cm2/min, find the rate at which the diameter decreases when the diameter is 10 cm.

(a). What quantities are given in the problem?

(b). What is the unknown?

(c). Draw a picture of the situation for any time t.

(d). Write an equation that relates the quantities.

(e). Finish solving the problem.