Answer:
The machine will be able to install 1600 bolts in 2 hours.
Explanation:
1. Create a rule of 3.
A rule of is basically saying "I can to this, with this much. How much can I do with that much?"
In this case, the machine can install 240 bolts in 180 minutes, how many can it install in 2 hours?
Before creating a rule of 3, we're going to have to convert 2 hours to minutes, because the work rate of the machine is given in minutes. Let's go ahead and do that:
2 hours * 60= 120 minutes.
Now, let's create our rule of 3.
18 minutes -------> 240 bolts
120 minutes -----> x
x= (120 * 240 bolts) / 18 minutes
x= 1600 bolts.
2. Conclude.
The machine will be able to install 1600 bolts in 2 hours.