In the diagram below, point A is southwest of point B. Jaleh walks for 400 seconds along path 1, going from point A to point B. She then run for 100 seconds from point B back to point A, following 3 paths. What is Jaleh’s velocity for the first part of her trip?

The gun from the crime scene shows tool marks where the serial numbers are ground off. there are also tool marks on the bullets left behind. what information can the tool marks on the bullets and gun provide about the crime? what type of evidence does this information provide, individual or class?