One Model for the Spread of an Epidemic Is That $60 \%$

question 63

Multiple Choice

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 3,000 inhabitants, 140 people have a disease at the beginning of the week and 1,500 have it at the end of the week. How long does it take for $60 \%$ of the population to be infected?
Select the correct answer.

• A) 17 days
• B) 22 days
• C) 37 days
• D) 7 days
• E) 27 days

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Definitions:

Target Market

A target market is a specific group of consumers at whom a company aims its products and services, defined by various demographics such as age, gender, income level, and personal interests.

Business-to-business

A sales model focusing on the transaction of products or services between companies, rather than between a company and individual consumers.

Demographic

Statistical data relating to the population and particular groups within it, used to identify markets and understand consumer segments.

Geographic

Pertaining to the physical locations or regions, often used in marketing to describe the distribution of markets or the targeting of customers based on where they live.