Final answer:
To find the arrival time, divide the total distance (400 miles) by the speed (50 mph) to get the travel time (8 hours), then add it to the departure time (4am) to find that the driver should arrive by 12pm.
Step-by-step explanation:
The student has asked how to calculate the arrival time of a driver who leaves at 4am and has to travel 400 miles at a consistent speed of 50 miles per hour (mph). To calculate the travel time, we need to divide the total distance by the speed:
Travel Time = Total Distance ÷ Speed
Travel Time = 400 miles ÷ 50 mph = 8 hours
Since the driver leaves at 4am, we need to add the travel time to the departure time to find the arrival time.
Arrival Time = Departure Time + Travel Time
Arrival Time = 4am + 8 hours = 12pm
Therefore, the driver should be able to make his delivery by 12pm, which corresponds to option B.