7 hours 30 minutes.
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To calculate the number of hours between 7:30 AM and 3:00 PM, we need to consider the total hours in a day, which is 24 hours. From 7:30 AM to 12:00 PM is 4.5 hours, and from 12:00 PM to 3:00 PM is another 3 hours. Therefore, the total number of hours between 7:30 AM and 3:00 PM is 7.5 hours.
From 3 PM on Friday to 3 PM on Sunday is a total of 48 hours. This is because there are 24 hours in a day, and from Friday 3 PM to Saturday 3 PM is 24 hours, and from Saturday 3 PM to Sunday 3 PM is another 24 hours, totaling 48 hours.
3 hours and 30 minutes.
From 3 AM to 8 PM, there are 17 hours. This is calculated by counting the hours from 3 AM to 12 PM (noon), which is 9 hours, and then adding the 8 hours from 12 PM to 8 PM.
9 hours