Final answer:
The car travels 35 miles per hour when it moves at a constant speed of 70 miles in 2 hours.
Step-by-step explanation:
To find out how far the car goes per hour when it moves at a constant speed of 70 miles in 2 hours, we can calculate the average speed. The formula for average speed is the total distance traveled divided by the total time taken.
We are given the total distance (70 miles) and the total time (2 hours), so we can use these values in our formula:
Average speed = Total distance / Total time = 70 miles / 2 hours = 35 miles per hour (mph).
Therefore, the car travels 35 miles in one hour.