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Mathematics 13 Online
OpenStudy (anonymous):

express the surface area S of a cube as a function of the length x of one of its edges.

OpenStudy (andrew314):

6*x^2

OpenStudy (andrew314):

Decided to explain my answer: Surface area is the sum of all sides. The area of one side is x^2. There are 6 sides, so do 6*x^2

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