Cathy and Chris got summer jobs at the cake shop and were supposed to work 20 hours per week each for 2 months. During that time, Chris got sick for one week and Cathy took her shifts. If there are four weeks in a month, how many hours did Cathy work during the 2 months?
There are 4 weeks in a month so Cathy and Chris were supposed to work for 4 weeks/month x 2 months = <<4*2=8>>8 weeks each.
Since Chris got sick then Chris was only able to work for 8 weeks - 1 week = 7 weeks while Cathy worked for 8 weeks + 1 week = 9 weeks.
Therefore, Cathy worked for 9 weeks x 20 hours/week = <<9*20=180>>180 hours.
#### 180