A football coach walks 10 meters eastward and then 18 meters westward and then 22 metered East ward and finally 34 meters westward

Well you never specified what you're asking... however, this might help you learn the concepts of displacements and magnitude.

:  The official displacement formula is as follows: s = sf - si. s = displacement; si = initial position; sf = final position

magnitude is the quantitative value of seismic energy. It is a specific value having no relation with distance and direction of the epicentre.

the magnitude of a vector in any dimension. For a 2d vector the formula is [math]|z| = \sqrt{x^2+y^2}[/math], where x and y are the x and y components of the vector respectively.

answer: 0.20

explanation: this can only be the answew because all the other measuremnets are not close

i guess it’s a and b