What is the radius of 12.4?

The term "radius" typically refers to the distance from the center to the edge of a circle or sphere. If you're asking for the radius of a circle with a circumference of 12.4, you can calculate it using the formula ( r = \frac{C}{2\pi} ), where ( C ) is the circumference. This gives a radius of approximately ( \frac{12.4}{2\pi} ), which is about 1.97 units. If you meant something else by "the radius of 12.4," please clarify.