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May 28, 2015

Homework Help: calculus

Posted by Melody on Thursday, February 17, 2011 at 3:18pm.

How do I set-up/solve this problem? Please help me.

The half-life of the radioactive isotope gallium-70 is 20 minutes. If the initial amount of gallium-70 is 25 milligrams, when will 10 milligrams be left?

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