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The above formulas are used in calculations involving the exponential deacy
of radioactive materials.
If you want to practice using the half-life calculator, use the following data.
The half-life of Radium 226 is 1,620 years. If you
started with 100 grams, in 3,240 years, 25 grams would be left.
Below, you may choose to solve for any of these 4 variables.
Answers are displayed in scientific notation and for easier readibility, numbers between .001 and 1,000 will be displayed in standard format (with the same number of significant figures.) The answers should display properly but there are a few browsers that will show no output whatsoever. If so, enter a zero in the box above. This eliminates all formatting but it is better than seeing no output at all.
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