Answer: 8 hours
Step-by-step explanation: multiply his regular pay and his regular number of hours he is expected in a week that is 11.80 × 40=472. Then subtract 472 from 613.60 that is 613.60-472 equals 141.60. Then to find how many hours he worked calculate 3/2 × 11.80=17.7. Then divide 141.60 by 17.7 that equals 8 hours.