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Unformatted text preview: 8. On a college campus of 15000 students, one student returned from vacation with a contagious flu virus. The spread of the virus through the student body is given by: where s (t) is the total number infected after t days. The college will cancel classes when 40% or more of the students are ill. i) How many are affected after 10 days? ii) After how many days will the college cancel classes? 9. The sales (S) of a new product after it has been on the market t years are given by: i) If 20000 units have been sold after one year what is k? ii) How many units will be sold after 5 years?...
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This note was uploaded on 03/16/2011 for the course ECON 1003 taught by Professor Dr.mcdonald during the Spring '11 term at University of the West Indies at Mona.
 Spring '11
 DR.MCDONALD

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