anonymous
  • anonymous
if the surface area of a sphere is 1256cm^2 if the diameter of the sphere is decreased by 5cm what is the surface area of the new sphere????? using pie=3.14
Mathematics
schrodinger
  • schrodinger
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anonymous
  • anonymous
what was the original diameter?
anonymous
  • anonymous
doesnt give one :(
anonymous
  • anonymous
The original radius was 10 cm, calculated from A=4 times pi times r squared. r squared is 100. If you reduce the radius to half, you'll reduce the surface area to one quarter.

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anonymous
  • anonymous
oh my goodness thanks so much :D

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