An unstable highenergy particle is created in the laboratory, and it moves at a speed of 0.984c. Relative to a stationary reference frame xed to the laboratory, the parcle travels a distance of 1.29 X 102 m before disintegrating. What is the distance measured by a hypothetical person traveling with the particle? (Hint: In this case, the proper time is associated with the particle's frame of reference.) Round to 3 sig gs