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 of uninfected people. In an isolated town of inhabitants, people have a disease at the beginning of the week and have it at the end of the week. How long does it take for of the population to be infected?

Question

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 of uninfected people. In an isolated town of  inhabitants,  people have a disease at the beginning of the week and  have it at the end of the week. How long does it take for  of the population to be infected?

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The Answer of 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 of uninfected people. In an isolated town of  inhabitants,  people have a disease at the beginning of the week and  have it at the end of the week. How long does it take for  of the population to be infected?

One Model for the Spread of an Epidemic Is That