To calculate the distance the student traveled during the first part of the trip at an average speed of 57 mi/h for 1 hour and 30 minutes, you can use the formula:
Distance = Speed × Time
First, convert the time to hours because the speed is in miles per hour:
1 hour and 30 minutes = 1.5 hours
Now, calculate the distance:
Distance = 57 mi/h × 1.5 h = 85.5 miles
So, during the first part of the trip, the student traveled 85.5 miles at an average speed of 57 mi/h.