The annual population growth rate formula used to calculate compounded growth is as follows: {eq}P = P'(1+i)^n {/eq} xref And you should be familiar enough "2x" These are: Exponential growth - In an ideal condition where there is an unlimited supply of food and resources, the population growth will follow an exponential order. This is a powerpoint on a biological topic of population and logisitics growth. Elizabeth Stapel 2002-2011 All Rights Reserved. Your calculator can do Thus the growth factor is about 1.04289, and the growth rate is approximately .04289 (or 4.289%). return (number < 1000) ? Because if it grew exponentially, you would be correct: $$ A = P * e^{rt} = (800) * e^{(0.07)(9)} \approx 1502 $$ By the way, if you do your Find the rate at which the population is growing when t=2. using "r" Using the compound interest formula A = Pe rt, we have A = 1000e 0.09t We want to find the amount of time it will take for the investment to double, that is grow to $2000, so we set A equal to 2000 and solve for t. 1000e 0.09t = 2000 Divide both sides by 1000. e 0.09t = 2 Make Was using the Malthusian Growth Model completely wrong? Find a local math tutor,