Please only do part a

D) Det 12. A music store sells an average of 120 music situ CDs per week at $24 each. A market survey c) De indicates that for each $0.75 decrease in price, 2 s five additional CDs will be sold per week. d) W a) Determine the demand, or price, function. e) W b) Determine the marginal revenue from the at weekly sales of 150 music CDs. Is a