One model for the spread of an epidemic is that the rate of spread is jointly proportional to the number of infected people and the number. uninfected people. In an isolated town of 6000 inhabitants, 160 people have a disease at the beginning of the week and 1500 have it at the end of the week. How long does it take for 60% of the population to be infected? O 31 days O 26 days O 41 days O 11 days O 21 days

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