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If the Intensity of the Beam Is 900 MR at a Distance

Question 28

Multiple Choice

If the intensity of the beam is 900 mR at a distance of 21 inches, what does the distance need to be for the intensity to measure 100 mR?

A) 7 inches.
B) 10.5 inches.
C) 42 inches.
D) 63 inches.

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