Question

What is the surface area of the sphere below?



A. 125pi units2
B. 100pi units2
C. 1253pi3 units2
D. cannot be determined

Answer 1

\( SA_{sphere} = 4 \pi r^2\)

Answer 2

wich gave me 2461.76

Answer 3

Don't forget, \(\pi\) is part of the answer in the options, so don't include it when you multiply--treat it like a constant after you multiply 4 and \(r^{2}\)

Answer 4

2461.76 is incorrect even if you include pi in the answer.
What numbers did you multiply?
You need t multiply 4 x 5 x 5 x pi, but leave pi as it is.