Solve the following problems. **Rule of 72**, **Simple Interest, & Future** **Value **

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__Rule of 72__

1. How many years does it take an investment __to double__ earning 5%? **Rule of 72**

2. How many years does it take an investment __to double__ earning 8%? **Rule of 72**

3. How many years does it take an investment __to double__ earning 7.50%? **Rule of 72**

4. How many years does it take an investment __to double__ earning 9%? **Rule of 72**

5. How many years does it take an investment __to double__ earning 4%? **Rule of 72**

#Rule #Simple #Interest #amp #Future

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