Question 9 (3 points) Approximately how long will it take Sam to double his $250,000 investment if it earns 6.5% interest, compounded annually?! O a) 10 years Ob) 11 years c) 2 years O d) cannot be determined Question 10 (3 points) To complement your 401K retirement savings at work, Andrew deposits $150 into a retirement account each month. The account generates a return of 9%, compounded monthly. If Andrew expects to retire in 40 years, how much will he have in his retirement account at that time? Assume he makes his deposits at the beginning of each month. a) $8,489,574.31 b) $707,464.53 c) $702,198.04 d) $8,426,376.49 e) $702,048.04