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9. A Jawbreaker candy is in the shape of a sphere and it melts at a rate proportional to its surface area. [3 points] [a.]

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9. A "Jawbreaker" candy is in the shape of a sphere and it melts at a rate proportional to its surface area. [3 points] [a.] Show that its radius shrinks at a constant rate. [b.] If it melts to 2 of its original volume in 15 minutes, how long will it take to melt completely

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