Answer:
After 18 years, Fred would have earned $40,675.05
Explanation:
Since we know that Fred has $13,915 and the interest annually (every year) is 6.14%, we can just solve for 18 years.
In the case, the equation would be the following:
13.915 x (1 + 0.0614) ^ 18
This equation would get you $40,675.05
Hope this helped! :D