Final answer:
Priscilla earns $11 per hour for babysitting her cousins. This is calculated by dividing her total earnings of $55 by the 5 hours she worked.
Step-by-step explanation:
To calculate how much Priscilla makes per hour babysitting her cousins, we can use the information provided: she babysat for 5 hours and earned $55 in total. To find her hourly wage, we divide the total amount she earned by the number of hours she worked.
Hourly wage = Total earnings ÷ Total hours worked
Hourly wage = $55 ÷ 5 hours
Hourly wage = $11 per hour
Therefore, Priscilla makes $11 for every hour that she babysits.