Answer: 2
Step-by-step explanation: In order to find out the radius you first need to find out the diameter. Diameter times pie or 3.14 equals the area. So, if the area is 12.4 you need to divide 12.4 by 3.14 which gives you 3.94 which rounds up to 4. The radius is half of the diameter so divide 4 by 2 to get 2