The school nurse must conduct lice checks at the elementary school. She must check 26 Kindergarteners, 19 first graders, 20 second graders, and 25 third graders. If each check takes 2 minutes, how many hours will it take the nurse to complete all the checks? Let's be accurate as possible.
The school nurse must check a total of 26 Kindergarteners + 19 first graders + 20 second graders + 25 third graders = 90 students in all. If every check takes 2 minutes, it will take 90 students x 2 minutes = 180 minutes. There are 60 minutes in one hour, so it will take 180 minutes / 60 = 3 hours to complete the checks.
The answer: 3.