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If the surface area of a sphere is 16 m2, find the radius.

4 pi r2 | 4 pi = SA | 4 pi

cross out 4 pi till left with r2

r2 = SA |4 pi

./r = ./SA|4 pi

r = ./SA|4 pi

r = ./16| 4 pi

= 1.13m

./ means root

| means divided or over

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Q: How do you find the radius of a sphere given the surface area?
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