Samuel would need 243.75 more gallons of gas for a pickup truck compared to a compact car when driving 13,000 miles per year.
To find out how many more gallons of gas Samuel would need for a pickup truck compared to a compact car for driving 13,000 miles per year, we'll calculate the gallons used by each type of vehicle.
For the compact car:
Gallons used = Total miles / Miles per gallon
Gallons used = 13,000 miles / 32 mpg (combined city and highway)
Gallons used = 406.25 gallons
For the pickup truck:
Gallons used = Total miles / Miles per gallon
Gallons used = 13,000 miles / 20 mpg (combined city and highway)
Gallons used = 650 gallons
Now, to find the difference in gallons between the pickup truck and the compact car:
Difference = Gallons for Pickup Truck - Gallons for Compact Car
Difference = 650 gallons - 406.25 gallons
Difference = 243.75 gallons
Therefore, Samuel would need 243.75 more gallons of gas for a pickup truck compared to a compact car when driving 13,000 miles per year.