anonymous
  • anonymous
Can someone help me? If a sphere has a diameter of 26 units then what is the surface area of the sphere? A.) 507 π square units B.)1,352 π square units C.)2,929 π square units D.) 676 π sqaure units
Mathematics
  • Stacey Warren - Expert brainly.com
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SOLVED
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chestercat
  • chestercat
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anonymous
  • anonymous
\[A = 4 \pi r^2 = 4 \pi 13^2 = 676 \pi\]
anonymous
  • anonymous
You just posted this.. Don't repost.
anonymous
  • anonymous
Did you find the surface area equation?

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anonymous
  • anonymous
@ muh4ha thanks so much :)
anonymous
  • anonymous
no problem katie - but you rly should try and understand it, so you can do it on your own. Did you get, why I plugged in 13 ?
anonymous
  • anonymous
ni can you explain?
anonymous
  • anonymous
Because the 'r' in the Formula is the 'radius' of the sphere - that's the distance from the center to the surface. You are given the diameter - that's twice as much (same as when looking at a circle).. So another way of writing the formula would be: \[A = 4 \pi ({d \over 2})^2\] okay? Did you get it? Any other questions?
anonymous
  • anonymous
oh wow thanks so much :)
anonymous
  • anonymous
you're welcome :) best thing to do, would be to try another example completely on your own and see if you can get it ;)

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