Three painters, beth, bill, and edie, working together, can paint the exterior of a home in 9 hours. bill and edie together have painted a similar house in 18 hours. one day, all three worked on this same kind of house for 4 hours, after which edie left. beth and bill required 8 more hours to finish. assuming no gain or loss in efficiency, how long should it take each person to complete such a job alone?

When it is 4: 00 a.m. in halifax, it is 1: 00 p.m. in karachi, and when it is 9: 00 a.m. in karachi, it is 5: 00 a.m. in warsaw. mary left halifax to fly to karachi, but she accidentally left her watch on warsaw time. according to mary’s watch, she left halifax at 9: 40 p.m. on monday. the local time when she arrived at karachi was 3: 00 p.m. tuesday. how long was mary’s flight? a. 9 hours, 20 minutes b. 13 hours, 20 minutes c. 14 hours, 20 minutes d. 17 hours, 20 minutes