Answer:
about 4.6 billion years old. Scientists measure its age by using radioactive decay of isotopes found in meteorites and rocks. The Potassium and Uranium isotopes were formed at the same time as the solar system. The inference is that the age of the rocks and meteorites, is the age of the solar system.
<span>I would say the third choice because it is really the only one that sounds appealing to a teenage audience.</span>
Microeconomics studies individual and business decisions while Macroeconomics analysis the decisions made by countries and governments. Microeconomics focuses on supply and demand and other forces that determine price level.
