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Old 12-25-2010
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Bacteria Bacterial Multiplication Numbers

Hi All,
Total streptococcus - 2 x 102 in the media, how many bacteria there will be after they double six times?
I know this is not difficult but I absolutely forget how to calculate it So little bit explain it not only simple answer.
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Old 12-25-2010
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2*2*2*2*2*2*2=1.28*10 4
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Old 12-25-2010
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Quote:
Originally Posted by kundra View Post
2*2*2*2*2*2*2=1.28*10 4
Thank you for such detailed description
Are you kidding?
My question is - technique multiplying, so why 1.28?
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Old 12-25-2010
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Quote:
Originally Posted by deyneko View Post
Thank you for such detailed description
Are you kidding?
My question is - technique multiplying, so why 1.28?
kundra took:
200 doubled six times, so
400, 800, 1600, 3200, 6400, 12800
12800 can also be written as 1.28 x 10^4

kundra did it the faster way:
2x10^2 doubled six times is (2x10^2) x (2^6)
which also comes out to 1.28 x 10^4
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Old 12-25-2010
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Quote:
Originally Posted by deyneko View Post
Thank you for such detailed description
Are you kidding?
My question is - technique multiplying, so why 1.28?
The technique is simple......

initial cell count = 2 x 10^2= 200
So in order to double it multiply it by 2.

2 x 2 x 10^2= 2 x200= 400

You want to double it six times, multiple it by 2 six times..

2 x 2 x 2 x 2 x 2 x 2 x 2 x 10 ^2 =128x 10^ 2= 1.28 x 10^4
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