Logarithms: Radioactive Decay
View the Lesson | MATHguide homepage Updated June 21st, 2023

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Formula: Radioactive Decay Formula
  
Given: There are 20 grams of Oxygen-15.
Oxygen-15 has a half-life of 2 minutes.
  
Find:  Use the formula above to calculate the time it would take for the given mass to degrade down to 0.21 grams. Calculate the solution for 't' to the nearest tenth using logarithms.
  
Solution:   t = minutes