Answer:
9%
Step-by-step explanation:
You want to know the interest rate that grows an initial investment of $25,000 and monthly payments of $230 to become a balance of $148,000 after 13 years.
There is no formula for the interest rate in this application. A financial calculator can figure it for you. The attachment shows one such calculator found the rate to be 9%.
Kylee earned an annual rate of 9% on her investment.