Rule of 72 This rule is used to approximate the time required for prices to double due to inflation. If the inflation rate is r %, then the Rule of 72 estimates that prices will double in 72/r years. For instance, at an inflation rate of 6 %, prices double in about 72/6 or 12 years. Write a program to test the accuracy of this rule. For each interest rate from 1 % to 20 %, the program should display the rounded value of 72/r and the actual number of years required for prices to double at an r % inflation rate. (Assume prices increase at the end of each year.) See Fig. 6.65.
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