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The width of a rectangle is increasing at a rate of 8 inches per second and its length is increasing at the rate of 4

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The width of a rectangle is increasing at a rate of 8 inches per second and its length is increasing at the rate of 4 inches por second At what rate is the area of the rectangle increasing when its width Is 7 inches and its length is 9 inches? [Hint: Let Wit) and L(1) be the width and length, respectively, at time t ] The rate that the area of the rectangle Is increasing is _ in /'s. (Simplify your answer )

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