What is the displacement of a person who leaves her porch to walk of 1 mile and then returns in 30 minutes? 1 mile 0 30 minutes none of the above

d = 0

Explanation: Displacement is defined as the change of position of an object.

So if the initial position is the porch, then walks a mile, and then returns (this means that the final position is also the porch)

So the initial position and the final position is the same, this means that the total displacement, d, is equal to zero.