A spherical snowball is melting at a rate of 6.8cm3min\displaystyle {6.8}\frac{\text{cm}^{{3}}}{\text{min}}. How rapidly is the radius decreasing when the snowball's volume is 288πcm3\displaystyle {288}\pi\text{cm}^{{3}}?

The radius is decreasing by cm/min.

(Your answer should NOT be a signed number, and should be rounded to 3 decimal places)

 

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