Answer:
You have to save $2.50 per day to pay the bill.
Step-by-step explanation:
Since your parents allow you to have Internet access on your cell phone as long as you prepay the bill, to determine, if your bill is $17.50 per week, we would need to work out how much you would have to save per day to pay the bill, you must perform the following calculation:
17.50 / 7 = X
2.5 = X
Therefore, you have to save $2.50 per day to pay the bill.