Answer: 18.85ft
Explanation:
The formula for the circumference of a circle is C = 2 x (Pi) x r, where r is equal to radius.
Pi is a constant number equal to 3.14, but if your calculator has a Pi button you should use that rather than typing in the numbers as it has a higher accuracy.
In this case we would do;
C = 2 x 3.14 x 3
Which gives us C = 18.85ft