Question

what is the surface area of a sphere that has a diameter of 4 cm.

Answer 1

Surface area is\[S=4 \pi r^2\]where r is the radius. Since the diameter is 4, the radius is 2. Good from here?

Answer 2

i got 50.24 but that wasnt any of my options.

Answer 3

\[S=4(3.14)(2)^2=16(3.14)=50.3\]

Answer 4

are your answer options in cm^2 or a different unit?

Answer 5

CM ^2

Answer 6

ok. unless it's a simple rounding error, you're out of luck because this is the correct answer to your question.