Question

3. A rumour is being spread in a community that the president is going to retire before the next election 2015. Initially 2 people were told the rumour and each of these people told 2 others the following day. Each of the 2 people told by the initial people told 2 others the day after they were told. If this process keeps up, how many people will be told the rumour on the fifth day?

Answer 1

62

Explanation:

You start with 2 people on day 1. On day 2 each one of them tells 2 other people, which means 4 new people are told the rumor. We can use the formula p(d)= n + n^n + n^(n+1) + n^(n+2).... d times, where p(d) is the number of people told the rumor on the day d, n being the Number of people told by each person every day, as well as the initial people. So the formula is

p(5)= 2 + 2^2 + 2^3 + 2^4 + 2^5 = 2+4+8+16+32 = 62

62 people are told the rumor on the fifth day.

Answer 2

I'm not sure if that's what is meant cuz the text is a little ambiguous

Nevertheless, 62 people

Explanation:

Amount = 2 + 4 + 8 + 16 + 32 =62 people

"Exponential Growth"