Back to 6.7 Exponential and Logarithmic Models

6.7 Exercise 60

Avg difficulty 2.5

Use this scenario: A tumor is injected with 0.5 0.5 grams of Iodine-125, which has a decay rate of 1.15% 1.15% per day.

A research student is working with a culture of bacteria that doubles in size every twenty minutes. The initial population count was 1350 1350 bacteria. Rounding to five decimal places, write an exponential equation representing this situation. To the nearest whole number, what is the population size after 3 3 hours?

OpenStax Algebra and Trigonometry 2e, 6.7 Exponential and Logarithmic Models, exercise 60

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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.