[I have here a question from one of my many revision sheet in preperation for my exams. The problem I'm having is with this parcticular question.[/SIZE] A 10 year research program is being carried out on two penguin rookery populations in Tasmania. Rookery A had 2000 penguins at the start of the study and the population has been decreasing by 5% per year. Rookery B had 3000 penguins initially and this population has been decreasing by 10% per year. a) Calculate how long it will take for the two populations to be the same. b) Find this actual figure. State any assumptions and use algebra, logarithms and other mathematics means (not a graphics calculator) to assist in your solution. I assumed it was to include growth and decay, so i started trying some things with that and got stuck very quickly. Any help is greatly appreciated.