Question

Find the length of the radius of a sphere with a surface area of 64.62 km. sq.
A)1.125
B)2.25
C)2.27
D)3.375

Answer 1

Use can use the formula :
\[SA = 4\pi r^2\]

Answer 2

SO HOW DO I SOLVE FOR R ?

Answer 3

Or in terms of Radius :
\[Radius = \sqrt{SA/4\pi}\]

Answer 4

C ?

Answer 5

Yes you did right..