Final answer:
Mia will pay interest for 100 years.
Step-by-step explanation:
Mia borrowed 5,000 from her grandparents to pay college expenses. She pays them 25 each month, and simple interest at an annual rate of 5% on the remaining balance of the loan at the end of each year. To calculate how many years she will pay interest, we can use the formula:
Remaining Balance = Principal - Total Payments + Total Interest
Let x be the number of years Mia will pay interest. The total payments she makes each year is 25 * 12 = 300. The total interest for x years is 5,000 * 0.05 * x = 250x. So, the equation becomes:
Remaining Balance = 5,000 - 300x + 250x
Since she will continue paying until the balance reaches zero, we can set the equation equal to zero and solve for x:
5,000 - 300x + 250x = 0
5,000 - 50x = 0
50x = 5,000
x = 100
Mia will pay interest for 100 years.