In 1-2 sentences, explain why the future value of an account that earns monthly payments of $25 at a variable annual interest rate for 36 months cannot be calculated by using the formula for the future value of an annuity. (2 points)
The future value of an annuity formula assumes a constant annual interest rate, while in this scenario the annual interest rate is variable. Additionally, the formula does not account for deposits made on a monthly basis.
