Results 1 to 2 of 2

Thread: growth constants...

  1. #1
    Apr 2008

    growth constants...

    if a bacteria culture starts with 6000 bacteria and doubles every 15
    minutes how many minutes will it take to reach the population 49000 ?

    12000= 6000e^k*15

    divide by 6000 so then you have


    ln2= lne^k*15
    that cancels out and leaves you

    ln2 =k*15 so you divide by 15

    this is where i freeze up what do u plug it into next to get the 49000

    so then its 49000/6000 =6000/6000 e^k*t

    but what do i use for the k & t this time is it what the k only equals or the k and the time i first used
    Last edited by jessxoxo; Apr 23rd 2008 at 10:36 AM.
    Follow Math Help Forum on Facebook and Google+

  2. #2
    Moo is offline
    A Cute Angle Moo's Avatar
    Mar 2008
    P(I'm here)=1/3, P(I'm there)=t+1/3

    Let T be the number of minutes necessary to reach 49000

    49000=6000 e^{kT}

    Do the same things as for getting k, but now to find T, not k
    Follow Math Help Forum on Facebook and Google+

Similar Math Help Forum Discussions

  1. Replies: 2
    Last Post: Oct 15th 2009, 06:06 AM
  2. Population growth with non-constant growth factor
    Posted in the Differential Equations Forum
    Replies: 0
    Last Post: Feb 3rd 2009, 04:46 PM
  3. constants of D.e
    Posted in the Calculus Forum
    Replies: 1
    Last Post: Jun 10th 2008, 11:32 PM
  4. ode's and constants
    Posted in the Calculus Forum
    Replies: 7
    Last Post: Feb 7th 2007, 07:34 AM
  5. Growth Periods - Continuous Growth
    Posted in the Algebra Forum
    Replies: 2
    Last Post: May 1st 2006, 03:19 PM

Search Tags

/mathhelpforum @mathhelpforum