Final answer:
To find out what part of an hour elapses between 10:45 a.m. and 11:09 a.m., we subtract the starting time from the ending time, which gives us a difference of 24 minutes.
Step-by-step explanation:
To find out what part of an hour elapses between 10:45 a.m. and 11:09 a.m., we need to subtract the starting time from the ending time.
Step 1: Convert both times to minutes.
10:45 a.m. = 10 * 60 + 45 = 645 minutes
11:09 a.m. = 11 * 60 + 9 = 669 minutes
Step 2: Subtract the starting time from the ending time.
669 - 645 = 24 minutes
Therefore, 24 minutes elapse between the two given times.