Answer:
They subtracted the values incorrectly
Step-by-step explanation:
The formula for finding the distance between two points is this:

The person subtracted the variables incorrectly and subtracted x1 from x2 and y1 from y2 instead of the other way around.
To correctly solve it, do this:
Hope this helped!
Answer: C≈62.83ft
Step-by-step explanation:
simply take your radius and times it by 2 and you get 20. then times twenty by pi.