You are hired as an expert witness for the defense of an employee who is being sued for exposing his supervisor to harmful radiation. The employee had a PET scan and was injected at 4:30 PM with glucose containing on the order of 1014 atoms of 14O, with a half-life of 70.6 s. Immediately after the scan was completed, at 5:30 PM, the employee met his supervisor for a dinner meeting, shook hands with him, and sat down at the same table for dinner. The supervisor looked shocked when the employee mentioned that he had just had a PET scan before the meeting. Later that evening, the supervisor started feeling ill and became convinced that it was radiation poisoning due to the significant radiation he received during his encounter with the employee. The supervisor quickly filed suit for radiation damage to his body against the employee based on this conclusion. In order to generate a defense argument for the employee, calculate the activity of the 14O in the employee’s body when the two sat down to have dinner at 5:30.
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