The distance around the tire or a motorized scooter is 21.98. the tires make one revolutioneer 1/10 second. Find the speed of the scooter in miles per hour.

for every 1/10 second it travels 21.98 inches

for a full second it travels 21.98 x 10 = 219.8 inches

for 1 minute it travels 219.8 x 60 = 2820 inches / 12 = 235 feet per minute

235*60 = 14100 feet per hour

5280 feet per mile

14100/5280 = 2.67 = 2.7 miles per hour