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A spherical snowball is melting. The radius after ? hours is 1−? meters. (Remember that the...

A spherical snowball is melting. The radius after ? hours is 1−? meters. (Remember that the volume of a sphere of radius ?R is 4?3?/34R3π/3.)

a) What fraction of the initial mass of the snowball remains after half an hour?

b) What fraction of the initial mass of the snowball remains after half an hour? (cubic cm per hour)

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