I have to figure out the radius and i am given the surface area?

Question

the question is: A sphere has a surface area of 1256.64 metres squared what is the radius?

Answer 1

A=4 pi r^2

1256.64=4 pi r^2

r=sqrt(1256.64/(4 pi))

r=10 meters

Answer 2

You gotta use the equation Surface area=4*pi*r^2(it means squared). Ten solve for r.
I'm going to use S for surface area here.
S=4*pi*r^2
S/(4*pi)=r^2
r=square root of (S/(4*pi))