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Anonymous
Exactly 7 of them are.
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420/60 = 7 hours
420 mi / 45 MPH = 9.33 hr = 9 hr 20 min
(7 min) x (60 sec/min) = 420 sec
7 hours
One week is equal to 24 x 7 = 168 hours. Therefore, 420 hours is equal to 420/168 = 2.5 weeks.