Answer:
Step-by-step explanation:
12 maybe
First you have to figure out the length of the track:

r is the half of the diameter:
200ft : 2 = 100ft

= 200

≈
628,31
The athlete has to run ca. 5280ft for one mile:
5280 : 628,31≈8,4
The athlete has to run 8,4 laps
More people have grown up or more people have found jobs
Hope this helps....
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2miles=20km
20km/4=5km
5km=0,5mile
Runned 0.5 miles in total