Final answer:
The estimated weight of one gallon of gasoline is 5.9 pounds, and the estimated cost per gallon when filling a 22-gallon tank for $91.30 is $4.15.
Step-by-step explanation:
To estimate the weight of one gallon of gasoline from a 22-gallon gas tank that holds 129.8 pounds of gasoline, you would divide the total weight of the gasoline by the number of gallons. This calculation shows: 129.8 pounds ÷ 22 gallons = 5.9 pounds per gallon. This is an estimate of the weight of one gallon of gasoline.
To estimate the cost per gallon when it costs $91.30 to fill a 22-gallon gas tank, divide the total cost to fill the tank by the number of gallons: $91.30 ÷ 22 gallons = $4.15 per gallon. This gives you an estimate of the cost per gallon of gasoline.