A movie that's 1.5 hours long is being replayed 6 times in one movie theater each day. There is a 20-minute advertisement before the start of the movie. How long, in hours, does the movie theater operate each day?
The movie that is being replayed 6 times takes 1.5 x 6 = <<6*1.5=9>>9 hours.
The advertisements before the start of the movie take 20 x 6 = <<20*6=120>>120 minutes in all.
One hundred twenty minutes is equal to 120/60 = <<120/60=2>>2 hours.
Thus, the movie theater operates for 9 + 2 = <<9+2=11>>11 hours each day.
#### 11