Answer: 95 Windows
Work: So, before we can do anything, we need to find out how many windows he can do in 1 hour. To do this, we divide 38 by 2. After this equation, he can do 19 windows in 1 hour. Multiply 19 by 5 to find out how many windows he can do in 5 hours, and you get 95 windows. I hope this helps. :)