eight years. What is the expected annual rate of growth?
SOLVE USING RULE OF 72.
Sol:
The RULE OF 72 is a method of estimating how long it will take compounding interest to double an investment.
The rule says that to find the number of years required to double your money at a given interest rate, you just divide the interest rate into 72. You can also run it backwards. If you want to double your money in eight years, just divide 8 into 72 to find that it will require an interest rate of approximate 9 percent.
Year (n) = 8 (Time to double)
Rate (r) = 72/n
Rate (r) = 72/8 = 9%
Therefore expected annual rate of growth is approximately 9%
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