- Wed Mar 19, 2014 12:32 am
- Forum: Advanced Algebra ("pre-calculus")
- Topic: Pre-cal homework help not just answer but how to do it too
- Replies:
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**1954**

This exercise uses the radioactive decay model. The half-life of cesium-137 is 30 years. Suppose we have a 128-g sample. (a) Find a function that models the mass remaining after t years. (Round rate r to three significant figures.) (b) How much of the sample will remain after 120 years? (Round your ...