The length of a rectangle is increasing at a rate of 4 cm/s and its width is increasing at a rate of 6 cm/s. When the length is 15 cm and the width is 6 cm, how fast is the area of the rectangle increasing? | cm²/s

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A:

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A: Let,

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Q: how

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A: The calculation are as follows

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Exponential Growth Model

The relation that represents an exponential function is: