Final answer:
Kiley's northwest movement can be determined by breaking down her north and west velocities into their vector components and using the Pythagorean theorem to find the magnitude.
Step-by-step explanation:
To determine Kiley's northwest movement, we can break down her velocities in the north and west directions into their vector components. Her northward velocity is 5.7 km/h, and her westward velocity is 5.8 km/h. Using the Pythagorean theorem, we can find the magnitude of her northwest velocity:
magnitude = sqrt((5.7 km/h)^2 + (5.8 km/h)^2) = 8.1 km/h
Therefore, the distance she traveled northwest is 8.1 km/h.