Knowing that her total bill for September is $113, we can subtract $65 since that is the phone service. We are left with $48, which is the total amount paid for gigabytes. We can divide that by 4 to get $12, and since each gigabyte is worth $12, it means that Aurora used 4 gigabytes.
Step-by-step explanation: I squared both 3.9 and 9.7 which gave me 109.3. Then, I square rooted it and got 10.45 which rounds to 10.5. Hopefully, this is right.
