Answer: 3 oil changes
Explanation:
You get an oil change for every 4,000 miles.
We want to know te number of oil changes you need to do in one year if you drive 1,000 miles per month.
Ok; in a year there are 12 months, and in each month you drive 1,000 miles.
then in a year you drive: 12*1,000 miles = 12,000 miles.
and each 4,000 miles you do an oil change, so in a year you make: 12,000/4,000 = 3 oil changes.
