Question from Sean, a student:
Could u help me with this question. The number, N, of people who have heard a rumor spread by mass media at time, t, in days is modelled by
N (t) = a / 1+ be^ -kt
a. If 50 people have heard the rumour initially and 300,000 people hear the rumour eventually, find a and b
b. If the rumour is initially spreading at the rate of 500 people per day, find k.