When it comes to population what is the Rule of 70?
98834
The rule of 70 states that to find the doubling time for any exponential growth, divide 70 by the percent of annual increase. So, if the population grows 10% per year, it will double in 7 years.
824405
73\n\nThe next one I think is 793
116560
For those of you not familiar with the rule of 70, it goes something like this:  If you invest your money at X percent, it will take 70/x years to double.\n\nHere is why it works. Suppose that x = X/100 (10% is really .10 = 10/100)\n\nIf you start with a principle amount of P and invest it at rate X, after n years you have P(1+x)^n\n\nYou want to solve for P(1+x)^n = 2P or  (1+x)^n = 2.\n\nTake ln of both sides you get ln((1+x)^n) = ln2\n\nnln(1+x) = ln2\n\nln(1+x) = ln2/n\n\nThe Taylor series for ln(1+x) is x - x^2/2 + x^3/3 - x^4/4 + ...\nFor small values of x, ln(1+x ~ x\n\nso x ~ ln2/n, and X ~ 100ln2/n.\n\nln2 = .6931... so  X ~ 69/n and n ~ 69/X\n\nTo see how accurate it is, you have to look at the size of - x^2/2 + x^3/3 - ... which is relatively small since you are generally talking about values of x < .1\n\nI think the reason for Rule of 72 is that 72 is divisible by 2,3,4,6,8, and 12.
310694
70\nUnless by 1/2 you mean divide by half of 30, the it's 25
1067486
64. or 72, depending on what type
642186
69..\n\nand try to paraphrase your friggin homework...
126757
45\nYou need a number that is the 2 power of a whole number and falls in that range.
81274
Different country has different rule. Max-14.\nIf a person is behving good, then it may reduced\nto eight.
299268
This is how it works...\n#70 is 7+0=7 and 70-7=63\n#71 is 7+1=8 and 71-8=63\n#72 is 7+2=9 and 72-9=63
592304
population and genaration
426966
it is like around 30 i heard\nim not sure
235500
Seventy three is the closest you can get.
911140
Ask "40" and "45".\nThey all live between these two.
670882
wHAT ARE THR RULES...?
815927
You just asked this, and I just answered it.  :)\n\nThe answer is 72.\n\nClick link to see this problem solved.
1087830
(m)\n\nPhilippines — Population: 87,857,473
59124
I've heard of 15. Look it up on the internet. You're sure to find something.