Posted by **Kim** on Wednesday, March 14, 2012 at 11:25pm.

Use differentials to find the approximate change in the surface area when the radius of the sphere is increased from 10cm to 10.2cm.

I know A=4pir^2 and A' is 8pir but I'm not sure how to set it up from here. Can someone please show me all the steps involved? (This isn't HW, just a textbook question that I can't figure out, thanks!)

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