Originally Posted by

**surffan** what the question is asking for is the rate of growth, so in order for me to find that i need to first find the derivative which I believe can be found if I alter the equation to become P(t)=500(1+e^-t)^-1 , the thing is I don't really know how to find the derivative for this equation since its exponential but it also contains e which makes it tricky, I know I can use a combination of the chain rule for exponential functions as well as the product rule, but I can't really figure it out using e.