# Question: Approximately how long would it take for an investment of

Approximately how long would it take for an investment of $100 to reach $800 if you earned 5 percent? What if the interest rate were 10 percent? How long would it take an investment of $200 to reach $800 at an interest rate of 5 percent? Why is there a difference between doubling the interest rate and doubling the initial investment?

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