Question

the ares of a circle with radius r is given by the formula A=pie*r^2. if a circle has area 225pie sq in. what the radius

Answer 1

225=pie*r^2
225/pie = r^2
15/sqrt(pie) = r
r = 8.4628

Answer 2

what is 8.4 in a fraction

Answer 3

\[A=\pi*r^2\]
\[225\pi=\pi*r^2\]
\[r^2=\frac{225\cancel \pi}{\cancel \pi}\]
\[r=\sqrt{225}\]
\[r=15\]