All edges of a cube are expanding at a rate of 2 centimeters per second. (a) how fast is the surface area changing when each edge is 2 centimeters
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Edge of square = 2
Surface area of cube = 6a^2
= 6 * 2^2
= 24
Surface area of cube = 6a^2
= 6 * 2^2
= 24
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