Radioactive isotopes used in cancer therapy have a “shelf-life,” just like pharmaceuticals used in chemotherapy. Just after it has been manufactured in a nuclear reactor, the activity of a sample of 60Co\n is 5000 Ci\n. When its activity falls below 3500 Ci\n, it is considered to be too weak a source to use in treatment. You work in the radiology department of a large hospital. One of these 60Co\n sources in your inventory was manufactured on October 6, 2011. It is now April 6, 2014.\nPart A\nIs the source still usable? The half-life of 60Co\n is 5.271 years\n.
[Expert Solution]: Radioactive isotopes used in cancer therapy…
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