Consider the exponential decay model for the hot- house experiment: N(t) = No exp{-At} (a) Find the time T, such that N(T,) = No exp{-1} . (b) Find the time T/2 such that N(T/2) = No/2. %3D (c) If No = 400, how many butterflies will be alive (according to this model) at time t = 4T/2? %3D

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