Exercise

3 days after the August 31 market crisis on the Wall Street, a poll of WPI freshmen showed that 77% had heard about it.

1.

How long will it take for 99% of the WPI freshmen to hear about the Black Monday?

2.

Plot the graph illustrating the diffusion of the news about the market crisis through the WPI freshmen as the function of time. From the graph, estimate how many students would be aware of the Black Monday after 5 and 7 days?