The revenue function from the sale of x earbuds for portable music players is given by R(X) - 15V 500x - 27 (0 sxs 200) Evaluate the marginal-revenue function at x = 40. Round your answer to the nearest whole number. Answer: Find the exact value of simple interest on a loan of $6,500, borrowed at 9%, made on July 22, and due on November 30. Use 365 days in a year and use the exact number of days in a month. Round to the nearest whole number of dollars