You walk 6.7 km to the east and then 10.9 km to the west. What is your displacement from where you started?

4.2 km West of the start

Explanation:

Displacement is a vector quatitiy which means it has direction adn magnitude. It is the distance you are at the very end of the journey from the start.

We can assign one way as a positive direction and the other a negative and then add them

I will say that West is positive and East is negative:

(10.9) + (-6.7) = 4.2km

there are no correct statementd on the list of choices you provided.

i am pretty sure it is c because when people are closer together, they cannot move as freely. picture being in a mostly full elevator, for instance. the people are right next to you, and you can barely move.