Logarithms: Radioactive Decay
View the Lesson | MATHguide homepage Updated November 17th, 2016

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Formula: Radioactive Decay Formula
  
Given: There are 17 grams of Carbon-11.
Carbon-11 has a half-life of 20 minutes.
  
Find:  Use the formula above to calculate the time it would take for the given mass to degrade down to 0.23 grams. Calculate the solution for 't' to the nearest tenth using logarithms.
  
Solution:   t = minutes