Question: how many hours is 9 to 6?
Answer: It depends if you are talking 9:30 AM to 6:30PM or 9:30PM to 6:30 AM both of those are 9 hours. However, if you are talking about a 24 hour clock that would make it 21 hours as it would go from 9:30 one morning to 6:30 the next morning. How many hours is it from 10:30 AM to 7:00 PM? How many minutes are in 4,000 hours?