Mathematics, 12.07.2019 23:30 shea3042
What is the approximate radius of the disc if the area is 78.5 square inches?
Answers: 2
![\bf \textit{area of a circle}\\\\ A=\pi r^2~~ \begin{cases} r=radius\\[-0.5em] \hrulefill\\ A=78.5 \end{cases}\implies 78.5=\pi r^2\implies \cfrac{78.5}{\pi }=r^2 \\\\\\ \sqrt{\cfrac{78.5}{\pi }}=r\implies 4.99873244587\approx r](/tpl/images/0082/6816/cc6ea.png)
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What is the approximate radius of the disc if the area is 78.5 square inches?...
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