The magnitude of the displacement is simply the distance between the archer's starting position and the target. In this case, the magnitude of the displacement is 53 meters.

Here's why:

* Displacement is a vector quantity, meaning it has both magnitude (size) and direction.

* Distance is a scalar quantity, only having magnitude.

Since we are only interested in the magnitude of the displacement, we ignore the direction (north) and simply state the distance, which is 53 meters.