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A block of ice is in the shape of a cube. The block is melting such that the edge is decreasing at a rate of

A block of ice is in the shape of a cube. The block is melting such that the edge is decreasing at a rate of 0.8 in./min. How fast is the surface area of the cube decreasing when the block edge is 15 inches in length? (Include proper units in your answer)

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