Final answer:
The average speed of a car that travels 320 miles in 4 hours is 80 mph. This is calculated using the formula of dividing the total distance by the total time taken.
Step-by-step explanation:
To calculate the average speed of a car that travels 320 miles in 4 hours, we use the formula:
Average speed = Total distance traveled / Total time taken
Here, the total distance traveled is 320 miles and the total time taken is 4 hours.
So, Average speed = 320 miles / 4 hours = 80 miles per hour (mph)
The car travels at an average speed of 80 mph.