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vazorg [7]
3 years ago
9

What is the radius of a sphere that has a surface area of 12.56 in^2

Mathematics
1 answer:
EastWind [94]3 years ago
8 0
A=4\pi R^2\\\\A=12.56\ in^2;\ R=?\\\\4\pi R^2=12.56\ \ \ |divide\ both\ sides\ by\ 4\pi\\\\R^2=\dfrac{3.14}{\pi}\\\\R^2\approx\dfrac{3.14}{3.14}\\\\R^2=1\\\\R=1\ (in)
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