Answer:
We require 9.67% return per year to achieve 300,000 in the future
Step-by-step explanation:
we need to solve for the rate at which a current value of 57,000 dollars will generate 300,000 dollars after 18 years:

Principal 57,000.00
time 18.00
Amount 300,000
![r=\sqrt[18]{300,000/57,000} -1](https://img.qammunity.org/2021/formulas/business/college/ckfn340eneo6p47le6gsykj7vcr9aolntt.png)
r = 0.096653034