06-09-2007, 06:19 PM
libartsmgr Wrote:--There was a question on some therory of 69 that I had never heard of so look that up
Thanks!
Looked up "69", it's a rule to calculate the time required for a population to double. Divide 69 by the growth rate in percent per year. If the growth rate is 1.2%/year, the doubling time is 69:1.2 = 58 (John Weeks 39)