The radioisotope .(15)P^(32) is used in ...

The radioisotope `._(15)P^(32)` is used in biochemical studies. A sample of this isotope has an activity 1000 times the detectable limits. How long could an experiment be run with the sample before the radioactivity could no longer be deteched `(t_(1//2)=14.2days)`?

28days

102days

142days

50days

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