Nikkiie Nikkiie

15-06-2017
Mathematics

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Radius of a sphere that has a surface area 12.56in2 use 3.14

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jdoe0001 jdoe0001

15-06-2017

[tex]\bf \textit{surface area of a sphere}\\\\ A=4\pi r^2\qquad \begin{cases} r=radius\\ -----\\ A=12.56 \end{cases}\implies 12.56=4\pi r^2 \\\\\\ \cfrac{12.56}{4\pi }=r^2\implies \sqrt{\cfrac{12.56}{4\pi }}=r[/tex]

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