Joey is training for a marathon. He burns 75 calories every hour running on a treadmill. At this rate, how many calories will Joey burn in 3 hours?
To find out how many calories Joey will burn in 3 hours, we can multiply his rate of burning 75 calories per hour by the number of hours he will be running:
75 calories/hour x 3 hours = 225 calories
Therefore, Joey will burn 225 calories running on the treadmill for 3 hours.