theboss40 theboss40

25-08-2018
Mathematics

contestada

What is the radius of a circle with an area o 32.1 square feet?

Respuesta :

jdoe0001 jdoe0001

25-08-2018

[tex] \bf \textit{area of a circle}\\\\
A=\pi r^2~~
\begin{cases}
r=radius\\[-0.5em]
\hrulefill\\
A=32.1
\end{cases}\implies 32.1=\pi r^2\implies \cfrac{32.1}{\pi }=r
\\\\\\
\sqrt{\cfrac{32.1}{\pi }}=r\implies 3.19652113187\approx r [/tex]

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