Answer:
About 9 years
Step-by-step explanation:
The rule of 72 tells us that the amount of time it takes to double your investment is 72 divided by the interest rate.
To get an approximation, we round of interest rate of 8.2% to 8% and then use the rule.
Time = [tex]\frac{72}{8}=9[/tex]
For deborah's investment of $3000 to go to $6000, it would take around 9 years.
