作者sampo123 (ask)
看板trans_math
標題[考古] 微分方程
時間Mon Jan 31 23:40:51 2005
Suppose that the percentage of the population that knows
the result of an election t hours after the result is
announced is P(t) = 100(1-Ce^(-kt)) If 40% of the population
knows the result 2 hours after it is announced, when will
80% of the population know it?
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