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OpenStudy (anonymous):

The radioactive isotope of iodine, I-135, decays into the radioactive isotope Xe-135 of xenon; this in turn decays into another (stable) product. The half lives of iodine and xenon are 6.7 hours and 9.2 hours, repectively. Write a system of differential equations describing the amounts of I-135 and Xe-135 present at any time.

OpenStudy (anonymous):

I'm not sure on how to do this, so if anyone can help, that'd be great.

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