Answer:
10.29%
Explanation:
Rule of 72 can be defined as a metric used to determine the time it will take to double an investment based on its growth rate.
To find the interest rate Kari must receive for her investment to double in 7 years, we would use the Rule of 72;
Rule of 72 = 72/7
Rule of 72 = 10.29%
Therefore, Kari must receive an interest rate of 10.29% for her investment to double in 7 years.
