Your car averages 28 miles per gallon (MPG). Your trip to work averages 14 miles. Gas costs 2.89 per gallon. What do you spend on average for gas per month going to work and back. (Assume you work 20 days per month).

57.8$

Explanation:

Here we know that:

- One trip to work averages 14 miles

- Therefore, one return trip home-work averages 14*2=28 miles

- You work 20 days per month

So, the average number of miles per month is:

Then, we also know that the car averages 28 miles per gallon; this means that the number of gallons consumed on average in 1 month is equal to the average number of miles (560) divided by 28:

So, 20 gallons per month.

Finally, we know that the cost of the gas is 2.89$/gallon. Therefore, the average total cost per month is equal to the average number of gallons per month (20) times the cost per gallon:

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