A typical chest X ray exposes a patient to an effective dose of 0.05 mSv. A) How many rem is this? Express your answer to two significant figures and include the appropriate units.   B)How many chest X rays would a patient have to receive before biological effects would be observed? (The limit is >25 rem.) Express your answer using two significant figures.

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A: As per bartleyby guidelines i answered only first question so please don't mind.thanks in advance.

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A: The Answer & The Explanation is shown below:

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