Maggie has purchased 1 cup of chocolate chips for some cookies she is baking, which is enough for 3/4 of a batch of cookies. How many cups of chips does she need for a whole batch of cookies?

Randy and trey take turns cleaning offices on the weekends. it takes randy at most 4 hours to clean the offices. it takes trey at most 6 hours to clean the offices. what is the greatest amount of time it would take them to clean the offices together? 2.4 hours 2.5 hours