Respuesta :

JohnES
You need the decay constant, lambda,

[tex]N=N_0e^{-\lambda t} [/tex]


After 600 days, and supposing you have t in days and some realtion between N and N0

[tex]\%=100(N_0/N)e^{-\lambda t}[/tex]and lambda in 1/days, then


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