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Significant Figures and Order of Magnitude

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Multiple Choice

The mass of a box measured by a grocer's balance is 2.3 kg. Two gold pieces of masses 20.15 g and 20.17 g are added to the box. The total mass of the box is:

  1. 2.3 kg
  2. 2.34 kg
  3. 2.340 kg
  4. 2.3403 kg
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