First you must decide on what length of the year you want to use: for example, the normal calendar year (365 days), a leap year (366 days), the average length for a Gregorian year (365.2425 days) or the astronomical year (365.2422 days). Whichever you choose, multiply that by 24 to get the number of hours.
launched on August 1, 1981
about 300 days a yaer
8,766 hours.
There are 168 hours in 1 week.
1 minute = 1/60 hours.
There is 24 hours in 1 day!!
168 hours in 1 week
There are 20 hours in 1 score
1.5 hours or 1 and 1/2 hours
1 (hour) 1 (hour) 1 (hour) 1 (hour) +__________ = 4 (hours)
8,766 hours.
87660 hours