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Calculating e coli cells in one colony watch

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    Okay i got this questiob wrong and in really not sure why. It said that one e coli cell was allowed to grow and replicates every 20 mins. With an incubation time of 10 hrs how many cells would you find?
    I did 10 times 60. Divided that by 20. I got 30 and did 2 to the power of 29 which gave me a massive answer which is apparently wrong. But I dont understand why. Help pls.
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    (Original post by err..)
    Okay i got this questiob wrong and in really not sure why. It said that one e coli cell was allowed to grow and replicates every 20 mins. With an incubation time of 10 hrs how many cells would you find?
    I did 10 times 60. Divided that by 20. I got 30 and did 2 to the power of 29 which gave me a massive answer which is apparently wrong. But I dont understand why. Help pls.
    I'm not sure why you did 2^29, in 10 hours the population doubles 30 times.
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    (Original post by Asklepios)
    I'm not sure why you did 2^29, in 10 hours the population doubles 30 times.
    But it starts off as one cell so you cant do 1 to the power of 29. So i doubled he one and raised it to the power of 29? Your way is correct but I really dont understand why
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    (Original post by err..)
    But it starts off as one cell so you cant do 1 to the power of 29. So i doubled he one and raised it to the power of 29? Your way is correct but I really dont understand why
    It doubles 30 times ie 1 x 2 x 2 x 2 x 2 ... etc, or just 1 x 2^30
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    (Original post by Asklepios)
    It doubles 30 times ie 1 x 2 x 2 x 2 x 2 ... etc, or just 1 x 2^30
    Still confused but thanks anyway.
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    (Original post by err..)
    Still confused but thanks anyway.
    It doubles 30 times, that means it x2 30 times. so

    1x2x2x2x2x2x2x2x2x2x2x2x2x2x2x2x 2x2x2x2x2x2x2x2x2x2x2x2x2x2=1x2^ 30
 
 
 
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