Acar is traveling at 20 m/s. it takes the car 120s to go from one intersection to a second. what was the displacement of the car between the two intersections?

We don't know if the road is perfectly straight between the intersections,  or if the road bends, curves, or turns between them.  So we don't have enough information to calculate the displacement between them.

But we can calculate the distance the car traveled between them.

Distance = (speed) (time)

Distance = (20 m/s) (120 s)

Distance = 2,400 meters

it doesn't. it was imagined up in the middle ages.