Your new weed-cutter requires, as fuel, a gas-to-oil mixture of 20-to-1 (20 parts of gas mixed with one part of oil). You have 1/2 of a gallon of gas. How much oil, in gallons, should you add to make it all into fuel for the weed-cutter?
A) 2
B) 1/2
C) 1/20
D) 1/40

Question

Quizplus · Accepted Answer

For a 20-to-1 gas-to-oil mixture, you need 1 part of oil for every 20 parts of gas. If you have 1/2 gallon of gas, you divide that by 20 to find the amount of oil needed: 1/2 ÷ 20 = 1/40 gallon.

Your New Weed-Cutter Requires, as Fuel, a Gas-To-Oil Mixture of 20-To-1