APPLICATIONS OF EXPONENTIAL | |

AND | |

LOGARITHMIC FUNCTIONS |

**DECAY WORD PROBLEMS:**

Work the following problems. Click on solution if you want to review
the solution.

**Problem 1:** If you start a biology experiment with 5,000,000 cells
and half the cells are dying every 10 minutes, how long will it take to
have less than 1,000 cells?

**Problem 2:** If a radioactive substance has a half-life of 300 years,
how long will it take for the substance to decay to 10 of its initial
amount?

**Problem 3:** If Jonly, Iowa had a population of 120,000 in 1945 and a
population of 65,000 in 1996, how large was the population in 1960 assuming
an exponential population model?

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