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Fluorine-18, which has a half-life of 110 min, is used in PET scans If 180. mg...

Fluorine-18, which has a half-life of 110 min, is used in PET scans If 180. mg of fluorine-18 is shipped at 7:00 A.M., how many milligrams of the radioisotope are still active when the sample arrives at the radiology laboratory at 4:10 P.M.? Express your answer to three significant figures and include the appropriate units

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