An epidemic follows the curve 900 P = 1 + 20,000e-0.549t million people, where P is the number of people infected and t is in years. How fast is the epidemic growing after 10 years? (Round your answer to two significant digits.) HINT [See Example 5.] x million people infected per year How fast is the epidemic growing after 20 years? (Round your answer to two significant digits.) x million people infected per year How fast is the epidemic growing after 30 years? (Round your answer to two significant digits.) x million people infected per year Need Help? Read It Watch It Submit Answer 13. [-/7.14 Points] DETAILS 0/30 Submissions Used The estimated monthly sales of Mona Lisa paint-by-number sets is given by the formula q = 99e SP + P, where q is the demand in monthly sales and p is the retail price in hundreds of yen. (a) Determine the price elasticity of demand E when the retail price is set at Y700. E = Interpret your answer. The demand is going ? + by % per 1% increase in price at that price level. Thus, a large price (? is advised. (b) At what price will revenue be a maximum? hundred yen (c) Approximately how many paint-by-number sets will be sold per month at the price in part (b)? (Round your answer to the nearest integer.) paint-by-number sets per month Need Help? Read It Watch It Submit Answer 14. [-/7.18 Points] DETAILS 0/30 Submissions Used The estimated monthly sales of Mona Lisa paint-by-number sets is given by the formula q = 101ep SP ?, where q is the demand in monthly sales and p is the retail price in hundreds of yen. (a) Determine the price elasticity of demand E when the retail price is set at Y300. Interpret your answer. The demand is going ? + by % per 1% increase in price at that price level. Thus, a large price ?| is advised. (b) At what price will revenue be a maximum? (Round your answer to the nearest integer.) yen (c) Approximately how many paint-by-number sets will be sold per month at the price in part (b)? (Round your answer to the nearest integer.) paint-by-number sets per month