madisonmaruhnich94
Find the surface area of the sphere to the nearest square unit.
hold on, i have to draw it



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madisonmaruhnich94
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dw:1347568958290:dw

lgbasallote
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\[\huge SA = 4\pi r^2\]
will that help?

Doman
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just make sure ur using the radius not the diameter

madisonmaruhnich94
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no it doesn't help/: A. 13 in.2
B. 50 in.2
C. 6 in.2
D. 3 in.2

madisonmaruhnich94
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how do i find the answer

lgbasallote
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what is your radius in this problem? do you know?


lgbasallote
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no. that is the diameter. to get the radius, divide that by 2


lgbasallote
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right. so substitute that to the equation i gave you

madisonmaruhnich94
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i feel like an idiot, idk what to do

lgbasallote
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r = 1 right? because it's the radius`


madisonmaruhnich94
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would it be 3 in^2

lgbasallote
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so replace r with 1 in the equation i wrote...what do you get?



lgbasallote
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will you elaborate how you got that?