cynthia ate 42 pieces of popcorn during the first 15 minutes of a movie. If she kept eating at the same rate, how many pieces of popcorn did she eat during the 2-hour movie? Write an equation and solve the problem.
Since we already know that she ate 42 pieces of popcorn within 15 minutes and we know there are 120 minutes in 2 hours, considering that cynthia ate at the same rate for 2 hours we can divide 120 minutes by 15 minutes to get 8. This means that Cynthia ate 42 pieces of popcorn 8 times within those 2 hours, so we would multiply 42 by 8 to get a total of 336 pieces of popcorn.
(120/15) X 42 = 336 pieces of popcorn