How do i find the height???
2 answers:
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The decay model is given as
The substance's half-life is the time it takes for the substance to decay to half its original amount. In other words, it's the time
such that 
. Substituting into the model, you have
You can solve for now.
The substance's half-life is the time it takes for the substance to decay to half its original amount. In other words, it's the time
You can solve for