Final answer:
To find out how many miles the car has traveled, subtract the amount of gas left in the tank from the total gas capacity of 16 gallons and multiply it by the gas mileage of 30 miles per gallon.
Step-by-step explanation:
To find out how many miles the car has traveled, we need to subtract the amount of gas left in the tank from the total gas capacity of 16 gallons. Let's assume the car has x gallons of gas left. The formula to calculate the number of miles traveled would be: Miles Traveled = (16 - x) * 30. For example, if there are 10 gallons of gas left in the tank, the car would have traveled (16 - 10) * 30 = 180 miles.