posted by Kim .
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!)
Ha! I figured it out.
r=10 , dr=10.2