Answer:
The answer is option A
Step-by-step explanation:
S = 4πr²
First of all divide both sides by 4π
That's
[tex] \frac{4\pi {r}^{2} }{4\pi} = \frac{S}{4\pi} \\ {r}^{2} = \frac{S}{4\pi} [/tex]
Find the square root of both sides in order to isolate r
That's
[tex] \sqrt{ {r}^{2} } = \sqrt{ \frac{S}{4\pi} } [/tex]
We have the final answer as
[tex]r = \sqrt{ \frac{S}{4\pi} } [/tex]
Hope this helps you
