60 minutes is one hour and you have 1 hr and 45 minutes = 105 minutes
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8:30 minus 60 minutes is 7:30 830 minutes minus 60 minutes is 770 minutes.
945 pm to midnight is 2 hours, 15 minutes. Midnight to 830 am is 8 hours, 30 minutes. The total is 10 hours, 45 minutes.
315
830 divided by 10 equals 83. That's it!
About 9.5 x 1015.