Assuming a period of 13 years has four leap years, then the number of seconds in thirteen years is equal to (60 x 60 x 24 x 365 x 9) + (60 x 60 x 24 x 366 x 4) = 410313600 seconds. If a period of 13 years has three leap years, then the number of seconds in thirteen years is equal to (60 x 60 x 24 x 365 x 10) + (60 x 60 x 24 x 366 x 3) = 410227200 seconds.
In a 50 year spell which includes 12 leap years, there are a total of (365 x 24 x 60 x 60 x 38) + (366 x 24 x 60 x 60 x 12) = 1577836800 seconds in 50 years. In a 50 year spell which includes 13 leap years, there are a total of (365 x 24 x 60 x 60 x 37) + (366 x 24 x 60 x 60 x 13) = 1577923200 seconds in 50 years.
Multiply the number of days by 86400 (that is, 24 x 60 x 60).
Let the number be x and so if 13-x = 73 then x = -60 because 13-(-60) = 73
13 x 60 = 780 minutes 780 x 60 = 46800 seconds
13 x 60 = 780
Assuming a period of 13 years has four leap years, then the number of seconds in thirteen years is equal to (60 x 60 x 24 x 365 x 9) + (60 x 60 x 24 x 366 x 4) = 410313600 seconds. If a period of 13 years has three leap years, then the number of seconds in thirteen years is equal to (60 x 60 x 24 x 365 x 10) + (60 x 60 x 24 x 366 x 3) = 410227200 seconds.
One day is equal to 60 x 60 x 24 = 86400 seconds. Therefore, 13 days is equal to 86400 x 13 = 1123200 seconds.
In a 50 year spell which includes 12 leap years, there are a total of (365 x 24 x 60 x 60 x 38) + (366 x 24 x 60 x 60 x 12) = 1577836800 seconds in 50 years. In a 50 year spell which includes 13 leap years, there are a total of (365 x 24 x 60 x 60 x 37) + (366 x 24 x 60 x 60 x 13) = 1577923200 seconds in 50 years.
Multiply the number of days by 86400 (that is, 24 x 60 x 60).
Let the number be x and so if 13-x = 73 then x = -60 because 13-(-60) = 73
Expressed as a percentage, 13/60 x 100 = 21.6 recurring (that is, 21.6666...) percent.
Sin 60 = opp/hyp, in this case opp/13 so opp = 13 sin 60 = 13 x (sqrt 3)/2 = 6.5 x 1.732 = 11.26 (and third side is 6.5)
Multiply 13 yrs x 365 days per yr x 24 hrs per day x 60 minutes per hr x 60 sec per minute.
94
13 x 4 and 60 x 3
13 days 1 hour = 1 + (13 x 24) = 313 hours 1 hour = 60 minutes 313 x 60 = 18,780 minutes