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Approximately how many years are needed to double a $100 investment when interest rates are 8.00 percent per year? (Round y answer to 2 decimal places.) eriod
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Answer #1

The "Rule of 72" in finance is a simple way to determine how long an investment will take to double, given a fixed annual rate of interest. By dividing 72 by the annual rate of Interest, investors can get a rough idea of how many years it will take for the investment to double.

So here; Investment is $ 100 and annual Interest rate is 8%.

So, according to Rule 72, it will take 72/8 i.e. 9 years to double $ 100.

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