Please help?!? Differential Question !!

Please help?!? Differential Question !!



The radius of a spherical piece of candy is 3cm. An outer shell of the candy is added that has a thickness of 2 mm. Use differentials to approximate the delta V (change in volume)... Please help! i have absolutely no idea :/ and i need you to show all works because i got about half way, but then thought something was wring and stopped. Thanks!





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