Question
The total mass of Rael and Dana is 8958 kg. Rael weighs 4115 kg. 
  1. What is Dana's mass?
  2. How much heavier than Rael is Dana?
4 m
(a)

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(b)

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The total mass of Rael and Dana is 8958 kg. Rael weighs 4115 kg. 
  1. What is Dana's mass?
  2. How much heavier than Rael is Dana?