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

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Formula: Radioactive Decay Formula
Given: There are 18 grams of Sulfur-35.
Sulfur-35 has a half-life of 87.3 days.
Find:  Use the formula above to calculate the time it would take for the given mass to degrade down to 0.2 grams. Calculate the solution for 't' to the nearest tenth using logarithms.
Solution:   t = days