Argh! This question is getting on my nerves. Help please?
11. A radioactive substance decays to 30% of its original mass in 15 months. Determine the half life of this radioactive substance to the nearest month.
Thanks! Any help appreciated...
11. A radioactive substance decays to 30% of its original mass in 15 months. Determine the half life of this radioactive substance to the nearest month.
Thanks! Any help appreciated...
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A(t) = A(o)(1/2)^(t/h)
.3 = (1/2)^(15/h)
15/h = (log.3)/(log.5)
h = 15/[(log.3)/(log.5)]
h = 8.6357 ===> 9 months
.3 = (1/2)^(15/h)
15/h = (log.3)/(log.5)
h = 15/[(log.3)/(log.5)]
h = 8.6357 ===> 9 months