Answer:
Seriously i know you r kidding its 4 for sure.
The coordinate (2,20) indicates that he rode 20 miles in 2 hours
Thats what I got. I hope it helps :)
An estimate helps you place the decimal point because when you place 3.7 and 5.1 to multiply you have to count how many spaces of numbers there are. So the answer is 18.87.