Lizzy: Carla needs to dry-clean 80 pieces of laundry by noon. If she starts work at 8 AM, how many pieces of laundry does she need to clean per hour?.
Me: Hmmm, let me think. I think this is the detailed solution:
First find how many hours Carla has to work: 12:00 - 8:00 = 4 hours. Then divide the total amount of laundry by the number of hours to find how many pieces Carla has to clean per hour: 80 pieces / 4 hours = 20 pieces / hour. Final answer: 20.