18. Jabada desires to have $80,000 eight years from now for her daughter's college fund. If she will carn 4.5 percent (compounded annually) on her money, what amount should she deposit now? 19. What is the future value of $55,000 invested for 17 years at 5% compounded annually? 20. Grace received a coin collection worth $50,000 from her uncle in Jan, 2020.If it was worth $10,000 in 1994, what is her uncle's rate of return on his investment? 21. How long will it take to double your money at 10% interest compounded annually? 22. Sylvia expects to receive $85,000 from a trust fund in 6 years. What is the current value of this fund if it is discounted at 9% compounded semiannually? I 23. You want to be able to buy $ 100 of today's goods in 20 years. How much would you need in 20 years to accomplish this goal if inflation averages 3%