Answer: 21 hours
Step-by-step explanation: If you find out all the hours in between it would be 9 hours on Monday, 6 hours on Tuesday, 5 hours and 30 mins on Thursday, and that random 30 mins. If we add that all up we get 9 hours + 6 hours + 5 hours + 1 hours ( take the 30 mins from Thursday and that awkward 30 min lunch break ). Simplify it ALL out and we get 10 hours + 11 hours, which come out to a grand total of 21 hours. HOPE THIS HELPS :)