The components of a vector v¯ can be written (vx , vy , vz). what is the length of a vector which is the sum of the two vectors v1¯ and v2¯ whose components are (8.0, -3.7, 0.0) and (3.9, -8.1, -4.4)?

The average time that it takes for the car to travel the first 0.25m is s. the average time to travel just between 0.25 m and 0.50 m is s. given the time taken to travel the second 0.25 m section, the velocity would be m/s.