3. A rumour is being spread in a community that the president is going to retire before the next election 2015. Initially 2 peop
le 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?
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
the best way to solve this is to have graph paper, so your numbers and points align. I have a model attached. the first point is hours slept 8. so on your graph go to 8 then across to 83, which is the test score. make a mark to represent this point. do this for all and it will create a line
