Final answer:
The average speed of the ball is 1.46 miles per minute.
Step-by-step explanation:
To find the ball's average speed, we need to convert the time and distance to the same units. The ball rolled 263 miles in 3 hours, so the average speed can be calculated by dividing the distance by the time:
Average speed = Distance / Time
Average speed = 263 miles / 3 hours
To convert the hours to minutes, we need to multiply by 60:
Average speed = 263 miles / (3 hours x 60 minutes/hour)
Now we can calculate the average speed:
Average speed = 263 miles / 180 minutes = 1.4611 miles/minute (rounded to the nearest hundredth).