The area of a regular octagon of side length a is A. <br> (a) Find the time rate of change of area of the octagon if its side length is being increased at a constant rate of beta m//s. Is the time rate of change of area of the octagon constant with time ? <br> (b) Find the approximate change in area of the octagon as the side length is increased from 2.0 m to 2.001 m.
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