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5- Use the "rule of 72" to estimate the doubling time (in years) for the interest rate, and then calculate it exactly. (Round your answers to two...

5- Use the "rule of 72" to estimate the doubling time (in years) for the interest rate, and then calculate it exactly. (Round your answers to two decimal places.)

6% compounded annually.

"rule of 72"____________    yr

exact answer __________    yr


6- Find the effective rate of the compound interest rate or investment. (Round your answer to two decimal places.)

25% compounded monthly. [Note: This rate is a typical credit card interest rate, often stated as 2.1% per month. ___________%


7- You have just received $145,000 from the estate of a long-lost rich uncle. If you invest all your inheritance in a tax-free bond fund earning 6.3% compounded quarterly, how long do you have to wait to become a millionaire? (Round your answer to two decimal places.) ____________yr


8- You have just won $120,000 from a lottery. If you invest all this amount in a tax-free money market fund earning 6% compounded weekly, how long do you have to wait to become a millionaire? (Round your answer to two decimal places.) ____________yr


9- In the following ordinary annuity, the interest is compounded with each payment, and the payment is made at the end of the compounding period. 


Find the accumulated amount of the annuity. (Round your answer to the nearest cent.)

$2500 annually at 6% for 10 years. $__________________

Top Answer

5- The time required to double the investment is 12 years.... View the full answer

1 comment
  • these are wrong
    • mich2226
    • Feb 03, 2019 at 10:41am

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