To solve the problem, we need to determine how many months the bill covers. First, we'll start by isolating the monthly costs from the total bill.
- Total Bill: $412
- Activation Fee: $100 (this is a one-time cost)
- Monthly Cost: $52
To find the total amount paid for the months of service, we first subtract the activation fee from the total bill:
\[ 412 - 100 = 312 \]
Now we have the total cost for the months of service, which is $312.
Next, to find the number of months covered by this bill, we divide the remaining cost by the monthly cost:
\[ 312 \div 52 = 6 \]
Thus, the bill covers 6 months.
The necessary operations to solve the problem are subtraction (to remove the activation fee) and division (to find the number of months in the remaining amount).
The correct response is:
subtraction and division