The answer is 333.75*.0525 which represents finding how much of 333.75 is 5.25% which is 17.52$ therefore the total cost is 351.271875 rounded to 351.27
about 78.09% of the atmosphere is nitrogen and 20.95% of oxygen so when we add 78 and 20 we get 98% .Therefore about 98%of the earth is composed of nitrogen and oxygen