If a car travels 350 miles in 5 hours, what is its average speed?

To determine the average speed of the car, you can use the formula for average speed, which is the total distance traveled divided by the total time taken. In this scenario, the car travels a total distance of 350 miles in a time of 5 hours.

Using the formula:

Average Speed = Total Distance / Total Time

Substituting the known values:

Average Speed = 350 miles / 5 hours = 70 miles per hour (mph).

Thus, the average speed of the car is 70 mph. This calculation shows that for every hour the car is in motion, it covers a distance of 70 miles, which aligns perfectly with the correct answer.

The other options represent speeds that do not correspond to the distance and time given. For example, speeds of 75 mph, 80 mph, and 85 mph would imply that the car traveled farther in the same timeframe, which contradicts the information provided in the question.