53.59 rounded to the nearest hunredth

Add the fractions, and simply the result to lowest terms. 2/3 + 2/7= ?

92ft long and 48 wide resurface 2.75$

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