3. A certain radioactive material is known to decay at a rate proportional to the amount present. If initially there are 100 milligrams of the material present and if after three years it is observed that 8 percent of the original mass has decayed, find (a) an expression for the mass at any time t, (b) the time necessary for 20 percent of the original mass to have decayed, and (c) what is its half-life. NOTE: Half-life is the amount of time for the radioactive material to decay one-half of the original amount.

3. A certain radioactive material is known to decay at a rate proportional to the amount present. If initially there are 100 milligrams of the material present and if after three years it is observed that 8 percent of the original mass has decayed, find (a) an expression for the mass at any time t, (b) the time necessary for 20 percent of the original mass to have decayed, and (c) what is its half-life. NOTE: Half-life is the amount of time for the radioactive material to decay one-half of the original amount.

College Algebra

1st Edition

ISBN:9781938168383

Author:Jay Abramson

Publisher:Jay Abramson

Chapter6: Exponential And Logarithmic Functions

Section: Chapter Questions

Problem 8RE: Suppose an investment account is opened with aninitial deposit of 10,500 earning 6.25...

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