21. On January 2, 2010, Claudia Company inherited a trust fund that she could use for college tuition. Claudia
hopes to make five equal withdrawals of $40,000 from the fund that will earn 10% compounded annually. The
first withdrawal will be made on January 2, 2011. How much does she need to have invested in the fund on
January 2, 2010, to be able to withdraw the needed amounts each year?
22. Abby wants to have $20,000 available in August 2015 to make a college tuition payment. To be able to have
this amount available, Abby will have to make equal annual deposits in an investment earning 12% annually in
August 2011, 2012, 2013, 2014, and 2015 in the amount of
23. Nancy’s parents loaned her $80,000 to fund her college education. Her parents are not charging interest.
They desire to be paid in one lump sum of $80,000 when Nancy can accumulate that amount. Nancy established
a savings plan that earns 8% compounded annually. Her new job promises to pay an annual holiday bonus that
will enable her to make equal annual, year-end deposits of $6,400. Approximately how many years will it take
Mary to accumulate the desired $80,000?
24. John desires to accumulate $13,603.83 by December 1, 2012. To accumulate that sum, he will make six
equal semiannual deposits of $2,000, beginning on June 1, 2010, into a fund that earns interest compounded
semiannually. What annual rate of interest must the fund provide to yield the desired sum?