At 7:00 a.m., a technologist prepares a dose of 99mTc MDP for injection at 10:00 a.m. that day. The desired dose is 22 mCi and no precalibration factors are available. The 3-h decay factor for the isotope is 0.707. What amount of activity should the technologist draw up into the syringe at 7:00 a.m.? (a) 15.6 mCi (b) 27.07 mCi (c) 29.5 mCi (d) 31.1 mCi
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