Earth is about ____________ years old.

0 votes
     4,000
      4.5 million
      5.4 million
      4.5 billion
      6.4 billion
asked Jun 13, 2012 in Geography by anonymous
    

1 Answer

0 votes
4.5 billion
answered Jun 15, 2012 by Geodude ~Top Expert~ (9,680 points)



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