What happens to a graph that is representative of exponential decay? the graph goes: a. down and to the right c. up and to the right b. down and to the left d. up and to the left

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