Based on 300 generation at 20 years a generation, if only the last 3 generations are alive, that it takes 9 months to have a baby, and 54% of the population are female, how many children must each mother have to bring the population to present day figures of 6.6 billion?
Please show workings.
2007-10-23 11:27:21 · 8 answers · asked by Anonymous in Science & Mathematics ➔ Mathematics
Flood theory around 4000 BC if you want.
I have it at 3.5
2007-10-23 11:28:47 · update #1
I know it's all rubbish, a contact of mine asked it earlier in R&S.
2007-10-23 11:36:33 · update #2
Dim blonde, it is now but people didn't live that long back then, appx 45 yrs
2007-10-23 11:38:14 · update #3
a generation happens every 20 years say, that was what I was given.
9 months is the gestation period of humans, this however does not take into consideration multiple births
2007-10-23 11:47:06 · update #4
This what we have to go on add your own model based on the info.
2007-10-23 12:05:52 · update #5
Aleks there are many variables but a simple model is ok, but please take death into considerartion, there is no info but shall we say that only the last three remain.
2007-10-23 12:28:18 · update #6
LOL I got that, Thanks
2007-10-23 12:43:15 · update #7
Vernon did you just fall asleep watching Kevin Costner in Waterworld
2007-10-23 12:49:55 · update #8
Grief I alway hated Math
I'll stick to Psychology, even though there is some Math involved.
2007-10-23 13:11:38 · update #9
So we have a grand total population of 150B
2007-10-23 13:13:36 · update #10
LOL, Link
Had to be done, my calculation were going way off, although it is possible, so the creationist could be right. eeeeeeeeeeekkk
2007-10-23 13:19:48 · update #11
What is it with me tonight my S button is not working
2007-10-23 13:20:58 · update #12
Define a generation and how 9 months is relevant? What is your math model?
Ok, a very simple model:
at age 20 each woman gives birth to 2 kids with 54% chance of female child.
Then the number of females in Nth generation is = 1.08^(N - 1)
Then number of females in 300th generation is 1.08^299 = 9.856B or total # of kids = 9.856 / .54 = 18.251B ...
if you add 2 previous generations you'll get ~50B population.
Considering that our model is very simplified and a real woman is able to have a children from age 14 to 50, we see that 6.6B is a really small number.
1.08^N is number of women born in Nth generation, not the sum of all women in all generations. Let me explain :
1st generation - 1 women
second 1.08
third 1.08 women (not 2.08) each had 1.08 daughters, 1.08^2 new born females and so on.
Oh, and don't forget 3 Noah's sons with wives! If Noah is "old" generation" and each of his sons had only 1 wife, than multiply everything by 3 :)
2007-10-23 11:41:54 · answer #1 · answered by Aleks 6 · 5⤊ 0⤋
Either way they're both ludicrous and against scientific fact :) If it's the year 5768, then the earth was created 5758 years ago, because humans were created on the 6th day.
2016-04-10 00:38:12 · answer #2 · answered by Anonymous · 0⤊ 0⤋
You're forgetting to take into account the Orthodox Jewish women who have (on average) 12 children each or the fact that some women don't have any children at all.
These numbers are skewed slightly due to other factors.
2007-10-23 11:34:19 · answer #3 · answered by Professor Farnsworth 6 · 5⤊ 0⤋
I was there when the great flood happened.
The Earth was nothing but a ball of water..(where all that water went..better ask god..)
However.. I saw Noah..he was the only solid object there.!.
He had over 50 million species of animals on board his ship..(the ark..)
The only problem was he forgot to bring a few females of his own species with him..(guess thats why were all crazy now...)
However please don't laugh.."My horse is still missin...!.".
2007-10-23 12:47:09 · answer #4 · answered by Anonymous · 4⤊ 0⤋
A generation is considered to be 30 years.
2007-10-23 11:31:15 · answer #5 · answered by Anonymous · 4⤊ 1⤋
you need to take into consideration the number of women who either can't or don't have children for whatever reason! (choice or medical conditions) which just help to prove it's all a load of BULL CRAP!
2007-10-23 11:31:59 · answer #6 · answered by skullian 5 · 6⤊ 0⤋
Thief!
http://answers.yahoo.com/question/index;_ylt=AufAkvSSL4_4_aQBf7Is8ujsy6IX;_ylv=3?qid=20071023091034AAMY9D2
Your one is even better.
2007-10-23 13:13:22 · answer #7 · answered by Link strikes back 6 · 3⤊ 0⤋
Lol!!!
2007-10-23 11:30:15 · answer #8 · answered by Vivi 5 · 5⤊ 0⤋