Final answer:
At a constant speed of 50 miles per hour, it will take the minibus 1.5 hours to travel a distance of 75 miles.
Step-by-step explanation:
To determine how long it will take the minibus to travel a distance of 75 miles at a constant speed of 50 miles per hour, we can use the formula for time, which is time = distance ∗ speed. In this case, the distance is 75 miles and the speed is 50 miles per hour. So the time it would take is calculated as 75 miles ∗ 50 miles per hour.
Performing the calculation: time = 75 ∗ 50 = 1.5 hours.
Therefore, the correct answer is a) 1.5 hours.