2
If you take the number of plane crashes from the last thirteen years (9/11 doesn't really throw the number off) there is a plane crash about every two days, with an average of 178 a year. They happen frequently, you just don't hear about them unless they have a high fatality rate.
2
500,000
There is no such age actually but for your own sake you need to be mature. But as per the rules, if you are not adult then, you can travel plane with escort. For that, you need to go through the proper channel.
The average speed of a passenger plane during flight is around 500 to 600 miles per hour.
the average number was 8
The average number is ~60.
the average speed for a plane is 500 to 900 miles per an hour.
A plane flight that is about 1,000 miles would cost $350 on average. This is just an average estimate according to miles, and varies per airline and country.
The average number of children per household in the United States was 3.
The average number of working days per month is 22.
The average number of goals per period in the NHL is around 2.7.