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Question: According to the "7:10 Rule of Thumb," if the exposure rate one hour after detonation of a nuclear weapon is 500 R/hr, the exposure rate approximately 14 days later (343 hours) will be approximately:

Options:

  1.  50 R/hr
  2.  5 R/hr
  3.  0.5 R/hr
  4.  0.05 R/hr

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3. 0.5 R/hr

According to the "7:10 Rule of Thumb," if the exposure rate one hour after detonation of a nuclear weapon is 500 R/hr, the exposure rate approximately 14 days later (343 hours) will be approximately 0.5 R/hr.

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