Split from Polynomials - Radioactive decay

[Edward Pacheco]

Can anyone help me with this question please A sample of radium has a weight of 1.5mg and a half life of approximately 6 years. How much mg of the sample will remain after 6 years?

 

[Deleted member 4993]

Can anyone help me with this question please A sample of radium has a weight of 1.5mg and a half life of approximately 6 years. How much mg of the sample will remain after 6 years?

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[HallsofIvy]

What does "half-life" mean? Notice that the time you are asked about, 6 years, is exactly the half-life! That makes this problem very easy.