11. Using the annuity table, we find that a dollar a year for 40 years with a 6 percent
12. Using the present-value table A29-1, we see that at a 3 percent interest rate, the
13. Since we’re not sure how long your expected lifetime is, we can use the annuity
rule which says that the present value of an annuity is the flow of income divided
by the interest rate, which in this case would be $200/.09 = $2,222.22. You should
14. If the interest rate is still 9 percent, the value of a lump sum of $20,000 in 10
15. To find the present value of a perpetuity of $100 per year, use the annuity rule,
a. Using the same interest rates, the future values of $100 are: $110 in one year and
b. Using the rule of 72, your money will double in: about 7.2 years at 10 percent,
16. a. Agree and disagree. Technically, a rise in stock prices does not imply a richer
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