Which Two Gases Make Up a Combined Total of 99

question 86

Multiple Choice

Which two gases make up a combined total of 99% of clean, dry air in the homosphere?

• A) carbon dioxide and water vapor
• B) nitrogen and oxygen
• C) nitrogen and argon
• D) oxygen and carbon dioxide

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Definitions:

Pounds

Pounds are a unit of weight measurement in the imperial system, equivalent to 0.453592 kilograms.

Least Squares Line

A regression line determined by minimizing the sum of the squares of the differences between observed and predicted values.

Sales

The exchanges of goods or services for money; the action of selling something.

Advertising

The activity or profession of producing advertisements for commercial products or services.