Final answer:
Steve's average speed is 0.23 miles per minute.
Step-by-step explanation:
To calculate the average speed, we need to divide the total distance traveled by the total time taken. In this case, Steve cycled 35 miles in 2 1/2 hours. To convert the 2 1/2 hours to minutes, we multiply it by 60, giving us 150 minutes. Now, we can divide the distance of 35 miles by the time of 150 minutes to get the average speed.
Average Speed = Distance / Time
Average Speed = 35 miles / 150 minutes
Average Speed = 0.23 miles per minute
Therefore, Steve's average speed is 0.23 miles per minute.