When the machine is cold, as it is in the first hour of production, it takes 6 minutes to produce each molded flower pot. Thereafter, once it is warm, it takes only 5 minutes to produce each pot. How many additional pots are produced in the last hour of the day, compared to the first?
In the first hour, it produces 60/6=<T>divide(60, 6)=10.0 pots.
In the last hour, it produces 60/5=<T>divide(60, 5)=12.0 pots.
12-10=<T>subtract(12, 10)=2 more pots are produced in the last hour.
