Ninety-five miles high.
Because it is over one mile above sea level, and thus is 'a mile high.'
5280 feet = 1 mile30000 feet / 5280 feet = 5.682 miles (rounded to third decimal).
I'm assuming you are talking about on a car. All vehicles have a service life. Somewhere around 150,000 miles you can expect things to start failing. Things like thermostats, alternators, water pumps...
1.24 miles (2 kilometres)