You run a rental center for landscaping equipment. a customer needs a mower, an edger, a tiller and a leaf vacuum for a weekend rental. the mower has a small 2-cycle engine that requires 2 ounces (oz) of oil per gallon of gas. you have only one quart of gas.

I think the question has to do with the amount of oil needed for the engine when you only have 1 quart of gas. The edger, tiller and the leaf vacuum are just unnecessary distraction. Just focus on the information on the engine for the mower. The solution approach we'll be using is the ratio and proportion. We are already given with the ratio of 2 ounces of oil per gallon of gas. So, if you are given the actual amount of gas, you can determine the amount of oil using the given ratio. However, make sure the units are consistent. Change the quart into units of gallon. The conversion is 1 quart = 0.25 gallon. Therefore,

2 oz/1 gal = x oz/0.25 gal
Soling for x,
x = 0.5 oz

Therefore, the engine needs 0.5 ounces of oil.