If repetition is not allowed, how many 4 letter codes can be formed from only 5 letters of the alphabet?
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The graph is attached, showing the intersection point at 13.5 years and populations of 235.2 for each population.
We only consider the portion of the graph from x=0 on, since negative time is illogical. Tracing the graph we get the intersection point.
We only consider the portion of the graph from x=0 on, since negative time is illogical. Tracing the graph we get the intersection point.