Aaron's monthly payment to pay off his student loans over the next 9 years would be approximately \$225.
To calculate the monthly payment for Aaron's student loans, we can use the formula for the monthly payment of a loan, which is given by the loan amount multiplied by the monthly interest rate divided by (1 - (1 + monthly interest rate)^(-number of payments)).
The formula is:
![\[ M = \frac{P \cdot r} {1 - (1 + r)^(-n)} \]](https://img.qammunity.org/2024/formulas/mathematics/college/18strbpr39gy45v9tkl8vqgkqjae72u2ox.png)
where:
- M is the monthly payment,
- P is the loan amount,
- r is the monthly interest rate,
- n is the total number of payments.
Given:
-

- Monthly interest rate
(0.25% converted to decimal),
- Number of payments
(9 years converted to months).
Let's substitute these values into the formula and calculate the monthly payment:
![\[ M = \frac{18700 * 0.0025} {1 - (1 + 0.0025)^(-108)} \]](https://img.qammunity.org/2024/formulas/mathematics/college/2g3odxa6y191e3yfkn0b0ioj9i4vbgh8ap.png)
Calculating this expression gives the monthly payment. Rounding to the nearest dollar, we get:
![\[ M \approx \$225 \]](https://img.qammunity.org/2024/formulas/mathematics/college/4y18ig19hmd38iih08jedd6dgfxuzw12lw.png)
Therefore, Aaron's monthly payment to pay off his student loans over the next 9 years would be approximately \$225.