Final answer:
Using the distance formula, by multiplying Mark's speed (15 meters per minute) with the time (20 minutes), we find that Mark has traveled 300 meters after 20 minutes.
Step-by-step explanation:
Mark drives his car at a speed of 15 meters per minute. To determine how far Mark has traveled after 20 minutes, we can use the basic distance formula Distance = Speed × Time. We multiply the speed (15 meters per minute) by the time (20 minutes).
Distance = 15 meters/minute × 20 minutes = 300 meters.
Therefore, after 20 minutes Mark has traveled 300 meters.