Final answer:
After buying a $5.99 binder, the student can purchase 4 folders at $1.99 each with the remaining $9.01 from their $15 budget.
Step-by-step explanation:
To determine how many folders a student can buy with $15 after purchasing a three-ring binder that costs $5.99, we need to perform a few calculations. Firstly, we subtract the cost of the binder from the total budget:
$15.00 - $5.99 = $9.01
Now that we have the remaining budget, we need to divide this amount by the cost of each folder:
$9.01 ÷ $1.99 ≈ 4.53
Since you can't buy a fraction of a folder, we round down to the nearest whole number, which is 4 folders. Therefore, the student can purchase 4 folders after buying the binder, using up most of their $15 budget.