Answer: Each lap that Marshall runs has 452.16 yards
Explanation:
Because the lap is circular, we know that the distance from the center of the track to any point of the path must be the same.
We know that he walkerd 72 yards, from the center to the path, se we know that the path is a cirlce of radius equal to 72 yards.
The perimeter of a circle is equal to P = 2*pi*r
where pi = 3.14
so we have that the perimeter of the track is 2*3.14*72 yards = 452.16 yards.
So each lap that Marshall runs has 452.16 yards