8b. During 2019 , an auction house sold a painting for a price of $3,170,000. The previous owner had purchased it seven years earlier at a price of $1,750,000. What was his annual rate of return on this painting? a. 12.56% b. 4.57% c. 1.46% d. 8.86% 8c. You deposit a single amount of $50,000 in a savings account that pays 7.2% annual interest (compounded monthly). How much will you have at the end of four and one-half years? a. $68,145 b. $69,065 c. $72,664 d. \$75,050 8d. Kant Miss Company is promising its investors that it will produce an annual return of 15%. How long will it take for your money to quadruple according to the promise? a. between 6 and 7 years b. between 8 and 9 years c. between 9 and 10 years d. between 11 and 12 years 8b. During 2019 , an auction house sold a painting for a price of $3,170,000. The previous owner had purchased it seven years earlier at a price of $1,750,000. What was his annual rate of return on this painting? a. 12.56% b. 4.57% c. 1.46% d. 8.86% 8c. You deposit a single amount of $50,000 in a savings account that pays 7.2% annual interest (compounded monthly). How much will you have at the end of four and one-half years? a. $68,145 b. $69,065 c. $72,664 d. \$75,050 8d. Kant Miss Company is promising its investors that it will produce an annual return of 15%. How long will it take for your money to quadruple according to the promise? a. between 6 and 7 years b. between 8 and 9 years c. between 9 and 10 years d. between 11 and 12 years