Calculate Bacteria Growth Rate: Doubling Time

[stegz]

Homework Statement

A beaker contained 2000 bacteira. one hour later the beaker contained 2500 bacteria. What is the doubling time of the bacteria?

Homework Equations

rate = (distance)/(time)
Time to double = .693/((ln(1+r))^t)

The Attempt at a Solution

rate = 2500/2000
My biggest problem is trying to find the rate, I used this at first, but think it is giving me the wrong answer. I know how to finish the problem, i just need help finding the rate. Thanks!

 

[Borek]

You should think in terms of N=N₀e^kt.