Mr. fat needs 20 minutes to eat a pound of cereal, while mr. thin needs 30 minutes. if they eat together, how long does it take for them to finish off three pounds of cereal? express your answer in minutes.

2. there are 250 students in a school auditorium. use numbers from the box to complete the table. 16, 38, 18, 45, 25, 50, 32, 60 grade number percent of all students of students fifth 24 sixth 95 seventh 20 eight 45