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The length of a rectangle is increasing at a rate of 8 cm/s and its width...

The length of a rectangle is increasing at a rate of 8 cm/s and its width is increasing at a rate of 9 cm/s. When the length is 9 cm and the width is 5 cm, how fast is the area of the rectangle increasing?

Math   Calculus   
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Answer #1

=length

w=width

Area of a rectangle

                         Apply product rule

                         Substitute all the values

Area of a rectangle in creasing at the rate of

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