00:10 (or 10 minutes past midnight).
2115 minutes is 35 hours and 15 minutes.
3 hours 15 minutes minus 1 hour 35 minutes = 1 hour and 40 minutes
35 hours 15 minutes.
6 hours 15 minutes = 375 minutes 2 hours 40 minutes = 160 minutes 375 minutes - 160 minutes = 215 minutes = 3 hours 35 minutes
25 minutes before 8 o'clock is 7:35.
(11 hours 25 minutes 20 seconds) + (4 hours 5 minutes 35 seconds) = 15 hours 31 seconds.
Kelly needs 15 + 20 + 35 = 70 minutes or 1 hour 10 minutes before she goes to work. She has to get up at 7:50. 9 hours 00 minutes - 1 hour 10 minutes or 8 hours 60 minutes -1 hour 10 minutes = 7 hours 50 minutes.
3 hours 40 minutes
Kelly needs 15 + 20 + 35 = 70 minutes or 1 hour 10 minutes before she goes to work. She has to get up at 7:50. 9 hours 00 minutes - 1 hour 10 minutes or 8 hours 60 minutes -1 hour 10 minutes = 7 hour 50 minutes.
3 hours, 35 minutes, and 45 seconds plus 1 hour, 45 minutes and 30 seconds is 5 hours, 21 minutes, and 15 seconds.
Each hour has 60 minutes so 40 hours = 2400 minutes. Then 2400 minutes + 35 minutes = 2435 minutes So 40 hours and 35 minutes = 2435 minutes
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