Answer:
18.04 gallons
Step-by-step explanation:
The cost of filling the empty tank of the vehicle is $71.98.
If each gallon of gas costs $3.99, then we have to find the volume of the sedan's tank in gallons.
Now, $3.99 is the cost of 1 gallon of gas.
Hence, $71.98 will be the cost of gallons.
Therefore, the volume of the tank is 18.04 gallons. (Answer)