Final answer:
The F-150 truck has a fuel efficiency of 15 miles per gallon, calculated by dividing the 300 miles traveled by the 20 gallons of gas used.
Step-by-step explanation:
To calculate the miles per gallon (mpg) of the F-150 truck, we need to use the formula:
mpg = total miles driven / total gallons of gas used
In this case, the truck uses 20 gallons of gas for a 300-mile trip. Thus, the calculation would be:
mpg = 300 miles / 20 gallons = 15 mpg
This means that the F-150 truck has a fuel efficiency of 15 miles per gallon.