Mathematics, 12.07.2019 17:30 nrosario33
What is the radius of a circle with an area o 32.1 square feet?
Answers: 1
![\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](/tpl/images/0081/7271/b1ad6.png)
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