(Answered) A 130-mg sample of technetium-99 m is used for a diagnostic

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A 130-mg sample of technetium-99 m is used for a diagnostic test. If technetium-99 m has a half-life of 6.0 h, how many milligrams of the technetium-99 m sample remains active 30 h after the test?

Express your answer to two significant figures and include the appropriate units.

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