The formula of the area of a circle is
A = \(\pi\)r²
75 cm² = \(\pi\) r²
Divide by \(\pi\) on either sides to isolate r
\(\frac{75}{ \pi }\) = \(\frac{ \pi r^2}{ \pi }\)
\(\pi\) and \(\pi\) cancels out
23.89 = r²
Take square roots to cancel power of two
\(\sqrt{23.89}\) = \(\sqrt{r^2}\)
4.89 cm ≈ r
I dont know if the question had any options, but this is how we do it.
