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According to economic theory, the demand it for a quantin in a free market decreases as the price p increases (see the gure). Suppose that the number x of (A) Fid dp - DVD players people are willing to buy per week from a retail chain at a price of 3p 6,000 dx \"=o.3p+1'15p570' E= Answer parts {It}, {B}, and (C). is given by a {E} Find the demand and the instantaneous rate of change at demand with 3'30 respect to price when the price is $30. Write a brief interpretation of these results. a The demand is x = B when the price is $30 [3 The instantaneous rate of change of demand with respect to price is :l when the price is $30. Demand IWrite a brief interpretation of these results. At a price level of$30, the demand is D DVD players per week and demand is Price walla-1;] : at the rate of l. {C} Use the results from part (B) to estimate the demand ifthe price is increased to $31 . The demand is approximately iithe price is increased to $31