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Willa Schaefer deposited $3,000 in a savings plan with her credit
union. The credit union savings plan pays 3% interest compounded
semiannually. If she makes no other deposits or withdrawals:
a. What is the amount in the account after 2½ years?
b. How much interest did her money earn?
c. What is the amount in the account after 4 years?
d. How much interest did her money earn?