17. Travis invested $9,250 in an account that pays 6 percent simple interest. How much more could he have earned over a 7-year period if the interest had compounded annually? A. $741.41 B. $773.58 C. $802.16 D. $833.33 E. $858.09 18. On your ninth birthday, you received $300 which you invested at 4.5 percent interest, compounded annually. Your investment is now worth $756. How old are you today? A. age 29 B. age 30 C. age 31 D. age 32 E. age 33