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anonymous
 5 years ago
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
anonymous
 5 years ago
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

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anonymous
 5 years ago
Best ResponseYou've already chosen the best response.0\[A = 4 \pi r^2 = 4 \pi 13^2 = 676 \pi\]

anonymous
 5 years ago
Best ResponseYou've already chosen the best response.0You just posted this.. Don't repost.

anonymous
 5 years ago
Best ResponseYou've already chosen the best response.0Did you find the surface area equation?

anonymous
 5 years ago
Best ResponseYou've already chosen the best response.0@ muh4ha thanks so much :)

anonymous
 5 years ago
Best ResponseYou've already chosen the best response.0no 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
 5 years ago
Best ResponseYou've already chosen the best response.0Because 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
 5 years ago
Best ResponseYou've already chosen the best response.0oh wow thanks so much :)

anonymous
 5 years ago
Best ResponseYou've already chosen the best response.0you'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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