Find the length of the radius of a sphere with a surface area of 78.54 km2.
A. 5 ft
B. 15 ft
C. 10 ft
D. 2.5 ft

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what google didn't work this time?

\[ Surface \ Area = 4 \pi r^2 \]
where r is the radius.
Use this formula to find the answer.

Google is not smart enough.

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