A barge can safely haul no more than 400 tons across the river. The barge has an empty weight of 24 tons. The average weight of the railroad cars is 4 tons each. How many railroad cars can the barge haul?

2. In order for the barge operator to meet his expenses, he has to haul
at least 120 tons of freight. How many railroad cars must the barge operator haul on each trip to at least break even?

3. Write a compound inequality that gives the range of the number
of railroad cars that the barge can haul which will allow the barge operator to at least break even.