Final answer:
The question involves finding the time at which two people traveling at different speeds will reach their destination, requiring calculations based on distance, speed, and time.
Step-by-step explanation:
The student's question involves calculating the times at which Brian and Sarah, who are driving at different speeds, will reach San Francisco from Los Angeles. Brian leaves Los Angeles at 8:00 a.m. and travels at a steady 50 mph. Sarah departs an hour later at 9:00 a.m. and maintains a speed of 60 mph. This problem requires understanding of concepts like distance, speed, and time, as well as the ability to solve equations to find the specific time each person will reach their destination.