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a. Each side of a square is increasing at a rate of 2 cm/s. At what...

a. Each side of a square is increasing at a rate of 2 cm/s. At what rate is the area of the square increasing when the area of the square is 49 cm2? cm2/s

b. The length of a rectangle is increasing at a rate of 4 cm/s and its width is increasing at a rate of 5 cm/s. When the length is 7 cm and the width is 5 cm, how fast is the area of the rectangle increasing?

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