Okay so you're trying to find the unit rate of 720yds/4min. If you divide 720 by 4 you will have the unit rate as 180yds/1 min or 60 sec then if you divide 180 and 60 by 4 again you will get the answer of 45yds/15sec.
It might be 2.5 but I could be wrong
I'm going to need more information before I can answer.
80 inches squared, I would assume based off of the other one.
Answer:
B | 8.45 miles per hour.
Step-by-step explanation:
8.45 x 2 is 16.9.