Let's just say the prof is not one of my son's favorite...he's taking the Bio class to finish out his general ed requirements (you have to have science in both disciplines and up until now, he had not taken any science classes on this side of the aisle.)
Hey this is the kid posting. Thanks for the help.
The first time I did the problem I got 12 as well but then I thought about it more, confused myself, then came back to that answer.
I figured that because there were 5 births every 10 years per individual, the population was replaced every 2 years. I then took the 24000 multiplied it by 500 (1000/2). Then divided by 1000000 to get the final answer.
Thanks again for the help.