Answered: 23. A substance has a half-life of…

College Algebra

1st Edition

ISBN:9781938168383

Author:Jay Abramson

Publisher:Jay Abramson

Chapter6: Exponential And Logarithmic Functions

Section6.7: Exponential And Logarithmic Models

Problem 33SE: For the following exercises, use this scenario: A tumor is injected with 0.5 grams of Iodine-125,...

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For the following exercises, use a graphing calculator and this scenario: the population of a fish farm in t years is
modeled by the equation P(t) = 1000/1 + 9e^−0.6t

23. A substance has a half-life of 2.045 minutes. If the
initial amount of the substance was 132.8 grams,
how many half-lives will have passed before the
substance decays to 8.3 grams? What is the total
time of decay?

25. Recall the formula for calculating the magnitude of
an earthquake, M = 2/3log(S/S sub0). Show each step for
solving this equation algebraically for the seismic
moment S.

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