At 24 mpg, Michael can travel 394 miles on a tank of gas.
We know that:
Distance traveled is equal to the product of the number of gallons in the tank and the average distance traveled on a single gallon by car
Now,
Number of gallons in the tank = 16.4
Distance traveled on a single gallon by car = 24
Total distance travled = 16.4 x 24
= 393.6 (394 Aprrox)
Therefore, At 24 mpg, Michael can travel 394 miles on a tank of gas.