You can use to roughly estimate how many years a given sum of money must earn at a given compound annual interest rate in order to double that initial amount.
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A. B. C. D.B
The answer to this question is B. the Rule of 72.
The Rule of 72 is a quick and simple way to estimate the number of years it will take for an investment to double in value at a given compound annual interest rate. It works by dividing the number 72 by the annual interest rate.
For example, if an investment has a compound annual interest rate of 8%, it will take approximately 9 years for the investment to double in value (72 divided by 8 equals 9). If the interest rate is 10%, it will take approximately 7.2 years for the investment to double (72 divided by 10 equals 7.2).
While this rule is not exact, it can be a useful tool for estimating the time required to double an investment. It is important to note that the Rule of 72 assumes a constant annual interest rate and does not take into account any fees or taxes that may impact the investment's growth.
To summarize, the Rule of 72 is a simple calculation that can be used to estimate the number of years it will take for an investment to double in value at a given compound annual interest rate.