Final answer:
At 3:00 p.m., your shadow will point towards the east if you are in the northern hemisphere since the Sun will be in the west at that time.
Step-by-step explanation:
At 3:00 p.m., the position of your shadow will depend on your location, specifically your latitude in the northern or southern hemisphere. However, for simplicity, let's consider you are in the northern hemisphere where, generally, the Sun is in the west during the afternoon. Since the shadow always points away from the Sun, at 3:00 p.m., you would expect your shadow to be cast toward the east.
Due to the Sun's movement across the sky, the shadow of an object will rotate in a clockwise direction throughout the day in the northern hemisphere. Thus, following this movement, in the afternoon, your shadow will be pointing away from where the Sun is, which would be to the east since the Sun is declining towards the western horizon.