If a race car completes a 4mi oval track in 73.2s, what is the average speed in units of mi/h?

To find the average speed of the race car, you need to divide the total distance traveled by the time taken. In this case, the race car completes a 4-mile oval track in 73.2 seconds.

To convert the time from seconds to hours, you divide by the number of seconds in one hour, which is 3600 seconds. So, 73.2 seconds is equal to 73.2/3600 hours.

Next, you divide the total distance of 4 miles by the converted time in hours to find the average speed.

Average Speed = Total Distance / Time

Average Speed = 4 miles / (73.2/3600) hours

Now, let's calculate the average speed:

Average Speed = 4 / (73.2/3600)

Dividing 73.2 by 3600 gives you approximately 0.020333.

Average Speed = 4 / 0.020333

Finally, divide 4 by 0.020333 to find the average speed:

Average Speed ≈ 196.58 miles per hour

Therefore, the average speed of the race car is approximately 196.58 miles per hour.