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Scientific Notation

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• 

  Microsoft reported approximately 45 billion dollars in sales during 1998. What is that amount expressed in scientific notation?

  
  

  4.5 × 10^9

  4.5 × 10^10

  45 × 10^10

  45 × 10^11

  
  
  

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• 

  Expressed in scientific notation, the Earth’s mass is 6.58 × 10^21 tons. Which of these is the number of zeros this measure would contain if it were written in decimal notation?

  
  

  19

  20

  21

  24

  
  
  

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• 

  What is 93,000,000 written in scientific notation?

  
  

  93 x 10⁶

  93 x 10⁷

  9.3 x 10⁷

  9.3 x 10⁶

  
  
  

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