To determine how many months it will take Carl's school to raise one million dollars at a rate of $10,000 per month, you can use the following calculation:
[ \text{Number of months} = \frac{\text{Total amount needed}}{\text{Amount raised per month}} ]
Given:
[ \text{Number of months} = \frac{1,000,000}{10,000} ]
[ \text{Number of months} = 100 ]
So, it will take them 100 months to reach their goal.