1. [-5 Points] LCALCCDNS 3.1.036. The table gives the cumulative sales of iPods since their introduction. Cu mulatlve [Pod Sales (a) Find the function for the quadratic model that gives sales in million iPods, where x is the number of years acer 2003, with data from G 5 x S 5. (Round all numerical values to three decimal places.) 5(x) - million iPods (b) Write the derivative for the sales model. (Round all numerical values to three decimal places.) s'(x) - million iPods per year (c) Calculate the rate of change of cumulative sales in 2006. (Round your answer to three decimal places.) :| million iPods per year Interpret the rate of change of cumulative sales in 2006. (Round your answer to three decimal places.) In 2006, cumulative iPod sales were by \\:| million per year. Need Help? 2. [-5 Points] LCALCCONs 3.1.038. A publishing company estimates that when a new book by a best-selling author is introduced, its sales can be modeled as n(x) - 58.91J; thousand books sold in the United States by the end of the xth week. Sales ouEiide the United States can be modeled as a(x} - 0.121x thousand books sold by the end of the xth week. (a) Write a formula for the total number of copies t sold by the end of the xth week. x) - thousand books (b) Write the rate-of-change formula for the total number of copies sold by the end of the xth week. t'(x) - thousand books per week (c) How many copies of the book will be sold by the end of 52 weeks? (Round your answer to three decimal places.) thousand books (d) How rapidly are books selling after 52 weeks? (Round your answer to three decimal places.) :| thousand books per week Write the answer in a sentence of practical interpretation. At the end of 52 weeks, sales are by E thousand books per week. Need Help