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.

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.

Algebra & Trigonometry with Analytic Geometry

13th Edition

ISBN:9781133382119

Author:Swokowski

Publisher:Swokowski

Chapter5: Inverse, Exponential, And Logarithmic Functions

Section: Chapter Questions

Problem 15T

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