Double your money-Rule of 72 . Approximately how long will it take to double your money if you get an annual return of \( 4.6 \%, 6.5 \% \), or \( 10.4 \% \) on your investment? Approximately how long will it take to double your money if you get a \( 4.6 \% \) annual return on your investment? 15.65 years (Round to two decimal places.) Approximately how long will it take to double your money if you get a \( 6.5 \% \) annual return on your investment? years (Round to two decimal places.)

To determine how long it will take to double your money using the **Rule of 72**, you can use the following formula: \[ \text{Years to Double} = \frac{72}{\text{Annual Return Rate (\%)}} \] Let's apply this to the given annual return rates: 1. **4.6% Annual Return** \[ \text{Years to Double} = \frac{72}{4.6} \approx 15.65 \text{ years} \] 2. **6.5% Annual Return** \[ \text{Years to Double} = \frac{72}{6.5} \approx 11.08 \text{ years} \] 3. **10.4% Annual Return** \[ \text{Years to Double} = \frac{72}{10.4} \approx 6.92 \text{ years} \] **Summary:** - **4.6% Return:** Approximately **15.65 years** - **6.5% Return:** Approximately **11.08 years** - **10.4% Return:** Approximately **6.92 years** These calculations provide a quick estimation of how long it will take to double your investment based on different annual return rates.