Answered: radioactive substance decays in such a…

radioactive substance decays in such a way that the amount of mass remaining after t days is given by the function m(t) = 9e−0.011t

College Algebra

7th Edition

ISBN:9781305115545

Author:James Stewart, Lothar Redlin, Saleem Watson

Publisher:James Stewart, Lothar Redlin, Saleem Watson

Chapter4: Exponential And Logarithmic Functions

Section: Chapter Questions

Problem 13CC

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Question

A radioactive substance decays in such a way that the amount of mass remaining after t days is given by the function

m(t) = 9e^−0.011t

where m(t) is measured in kilograms.

(a) Find the mass at time t = 0.
kg

(b) How much of the mass remains after 42 days? (Round your answer to one decimal place.)
kg

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