North American Cicadas
The North American Cicada.
The North American Cicadas.
7 of 10 leap years occur every years?
i thought it was every 7 years, because there are 7 days in a week
We do not have a leap year every 7 years. It is every 4 years. It is possible that in a sequence of 7 years, that there is only one leap year in the middle of it. For example 2000 and 2008 were leap years, so in the intervening 7 years, there was only one leap year:2001200220032004 was a leap year.200520062007In order keep the calendar years synchronized there has to be a extra day added to February every 4 years. The other years that are not leap year are called common years.
7 years
7 years
Yes, it should be changed roughly every 100,000 miles or 7 years which ever comes first.
Must be changed every 105,000 miles or 7 years whichever comes first. Warning: This is an interference engine.
Every chapter comes out every two weeks
it is every 8 years between filing dates for chapter 7s.