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(2 points) The number x of stereo speakers a retail chain is willing to sell per week at a price of p dollars is given

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(2 points) The number x of stereo speakers a retail chain is willing to sell per week at a price of p dollars is given by x = 81vp+ 30 - 400. Find the supply and instantaneous rate of change of supply when the price is 75 dollars. Supply = Instantaneous rate of change of supply =

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