What atomisheric layer is 140 plus km?

How much dirt is there in a hole that measures 2ft by 4ft by 6ft deep? What do enzimes do? What is the name of the entire system of rational and irrational numbers? Is 3.25 a rational number? What is 12.57 rounded to the nerest whole number? How many palindromes between 1000 and 3000? How many minutes are in 10 of a 60 minute hour? Two positive integers have a product of 98 one integer is twice the other? How can you calculate the area of a circle with a radius of 1.4m Please show your method of doing so? What is the script to charlie the unicorn? What is the Average weight for 4 feet 7 inches? How many times is the word hope found in the Bible? Why does only one foot swell especially the top part of the bottom? True or False In the event of a skyjacking you should immediately attempt to subdue the skyjackers.? How many cm is 5 feet 7 and a half inches? What is 9 over 57 in simplest form? What does 45x20 equal? What is less than 100 and has four digits? What percent of 750mt is 125mt? What is -y minus 12?