Question: The width of a rectangle is increasing at a rate of 9 inches per second and its length is increasing at the rate of 3

The width of a rectangle is increasing at a rate of

The width of a rectangle is increasing at a rate of 9 inches per second and its length is increasing at the rate of 3 inches per second At what rate is the area of the rectangle increasing when its width is 7 inches and its length is 8 inches Hint Let W t and L t 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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