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6.8 Exercise 170

Avg difficulty 2.5

A radiation safety officer is working with 112 112 grams of a radioactive substance. After 17 17 days, the sample has decayed to 80 80 grams. Rounding to five significant digits, write an exponential equation representing this situation. To the nearest day, what is the half-life of this substance?

OpenStax Algebra and Trigonometry 2e, 6.8 Fitting Exponential Models to Data, exercise 170

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Adapted from College Algebra © 2021 Rice University. Licensed under CC BY 4.0. Sources: College Algebra 2e, Algebra and Trigonometry 2e, Precalculus 2e, College Algebra with Corequisite Support 2e. Imported at revision 4922e46.