mckenzieandjesus
  • mckenzieandjesus
What is the surface area of a sphere with a radius of 30 m? 1,800π m2 90,000π m2 3,600π m2 900π m2
Mathematics
schrodinger
  • schrodinger
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mckenzieandjesus
  • mckenzieandjesus
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mckenzieandjesus
  • mckenzieandjesus
@peachpi i cant remember how to do this..
anonymous
  • anonymous
A = 4πr² plug in 30 for r

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welshfella
  • welshfella
surface area of sphere = 4 pi r^2
mckenzieandjesus
  • mckenzieandjesus
i thought i tried that but kept getting the wrong answer.. 4*3.14*30^2=11304
anonymous
  • anonymous
the π is in your answer choices, so don't include it in the multiplication. Just do 4*30² and stick π at the end of that number
mckenzieandjesus
  • mckenzieandjesus
oh thats what got me confused okay, thank you

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