A store has determined that the number of BIu-ray movies sold monthly Is approximately n(x) = 6250(0.927") movies where x is the average price in dollars. (a) Write the function for the model giving revenue In dollars. where it Is the average prloe ln dollars. (b) If each movie costs the store $10.00, write the function for the model that give prot in dollars, where x is the average price in dollars. it) Complete the table. (Round your answers to three decimal places.) thll of change of Revenue Ind Profit late of change late of change of revenue of prot (dollars per dollar) (dollar: per dollar) id) What does the table Indicate about the late of change In revenue and the late of change In profit at the same price? There is a range of prices beginning near $14 for which Hie rate of change of revenue is -~Selaet~ o (revenue is Seioct c ) while the rate of change of profit ls Selat:l a (prot is Salact c ). The table gives the cumulative sales of iPOds since their introduction. Cumulative lPod Sales (Inllllon IM) 30.133 69.442 1 20.872 175.3 (a) Find the function for the quadratic model that gives sales in million iPods, where x is the number of years after 2003, with data from u s x e 5. (Round all numerical values to three decimal places.) million iPods U 5(1) = (b) Write the derivative for the sales model. (Round all numerical values to three decimal places.) s'(x) = |: million lPods per year (c) Calculate the rate of change of cumulative sales in 2005. (Round your answer to three decimal places.) million iPads per year Interpret the rate of change of cumulative sales In 2005. (Round your answer to three decimal places.) In 2005, cumulative lPod sales were -s.laol c by million per year