Final answer:
Jill's hourly rate for babysitting is calculated by dividing her total earnings of $480 by the total hours worked, which is 24 hours, resulting in an hourly rate of $20 per hour.
Step-by-step explanation:
To calculate Jill's hourly rate for babysitting, we divide the total amount earned by the total number of hours worked. Jill worked for 3 hours each night for 8 nights, which totals to 24 hours of work. She earned $480 in total. Therefore, her hourly rate is calculated as follows:
Total earnings = $480
Total hours worked = 3 hours/night × 8 nights = 24 hours
Hourly rate = Total earnings ÷ Total hours worked = $480 ÷ 24 hours = $20 per hour
So, Jill earned $20 per hour for babysitting.