Final answer:
To determine Willy's arrival time at school, add 1 hour and 35 minutes to his departure time of 9:30 am, which results in an arrival time of 11:05 am.
Step-by-step explanation:
The student question is a problem about calculating time.
Willy starts his journey at 9:30 am and the trip takes 1 hour and 35 minutes. To find the arrival time, we add 1 hour and 35 minutes to the start time.
Step 1: Add 1 hour to 9:30 am which gives 10:30 am.
Step 2: Now add the remaining 35 minutes to 10:30 am.
10:30 am + 35 minutes = 11:05 am
Therefore, Willy arrives at school at 11:05 am.