anonymous
  • anonymous
A bacteria culture begins with 4 bacteria which double in size every hour. How many bacteria exist in the culture after 8 hours?
Mathematics
jamiebookeater
  • jamiebookeater
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JamesJ
  • JamesJ
How many exist is 1 hour?
JamesJ
  • JamesJ
Write n(0) = the number at the beginning. We have n(0) = 4 What's n(1) = # at hour 1?
JamesJ
  • JamesJ
n(1) = 2 x 4 = 8 because the number of bacteria doubles every hour. Now, what is n(2) ? I'm asking you this so you can get to a formula for n(8).

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JamesJ
  • JamesJ
@kirihara, talk to me.
anonymous
  • anonymous
initial no. of bacterias=4 common ratio(divison)=2 bacterias after 8hrs= ar^n=4x2^8..............rest is calculations..
anonymous
  • anonymous
hey if they doubles its size then after 8 hrs we will be left with those 4 large becterias only!!............there is difference between doubling in size and divison
anonymous
  • anonymous
Never mind found out! XD the answer is 1024 you do (4)(2)^8 the two comes from doubling each hr

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