2x8=16 quarts and in a gallon there is 4 quarts so 16/4=4 ANSWER:Gus used 4 gallons of paint in the 8 hours that he painted because 2 times 8 is 16 quarts and since there is 4 quarts in a gallon,16 divided by 4 is 4 so Gus used 4 gallons of paint.
1h : 2 2h: 2 1 gallon after two hours 3h: 2 4h: 2 1 gallon after another two hours 5h: 2 6h: 2 1 gallon again after two hours 7h: 2 8h: 2 1 gallon...etc
Gus has used 4 gallons after painting his house for 8 hours using 2 quarts per hour.