If a car goes around a turn too quickly, it can leave tracks that form an arc of a circle. By finding the radius of the circle, accident investigators can estimate the speed of the car. To find the radius, accident investigators choose points A and B on the tire marks. Then, the investigators find the midpoint C of AB¯. Use the diagram to find the radius r of the circle. Round your answer to the nearest tenth.

Guest May 11, 2018