When full, a 22-gallon gas tank holds 129.8 pounds of gasoline. estimate the weight of one gallon of gasoline. if it costs $91.30 to fill the gas tank, estimate the cost per gallon.

So a 22 gallon of gas tank can hold 129.8 pounds of gasoline.
What is the weight of 1 gallon of gasoline:
=> 129.8 divided by 22 to get the value of 1 gallon weight
=> 129.8 / 22 = 5.9
Thus, each gallon of gasoline weigh 5.9 pounds.
Now, let’ find the cost of every gallon if the total costs of 22 gallon is 91.30 dollars
=> 91.30 dollars divided by 22 to get the answer
=> 91.30 / 22 = 4.15
So every gallon costs 4.15 dollars.