Mathematics, 22.07.2019 21:20, ssssss190

Arumor spreads among a group of 400 people. the number of people, n(t), who have heard the rumor by the time t in hours since the rumor started to spread can be approximated by a function of the form
n(t) = 400 / (1+399e^(-0.4t))
approximately how long will it take until half the people have heard the rumor?

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Arumor spreads among a group of 400 people. the number of people, n(t), who have heard the rumor by...