Cost = (Distance / Gas Mileage) * Cost per Gallon
Given:
Distance = 800 miles
Gas Mileage = 17 mpg
Cost per Gallon = $4.00
Plugging these values into the formula, we get:
Cost = (800 miles / 17 mpg) * $4.00
Cost = (47.06 gallons) * $4.00
Cost = $188.24
Therefore, it will cost approximately $188.24 to drive 800 miles at $4.00 per gallon with a 17 gallon tank.