Final answer:
The average velocity of a car that travels 30 km due west in 0.50 hour is 60 km/hr west, calculated by dividing the displacement by time.
Step-by-step explanation:
The average velocity of a car that travels 30 kilometers due west in 0.50 hour can be found by dividing the total displacement by the total time taken. The formula for average velocity is average velocity (Vavg) = displacement / time. Therefore, Vavg = 30 km / 0.5 hr, which equals 60 km/hr west. This is because average velocity is a vector quantity that includes both magnitude and direction. Velocity must account for the direction of the travel, so the correct answer is D) 60 km/hr west.