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Math Help - bacteria problem

  1. #1
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    bacteria problem

    the number of bacteria present in a culture after t minutes is given as B = 1000e^kt. if there are 3448 bacteria present after 7 min...find k
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  2. #2
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    If B = number of bacteria, then you can solve the equation by plugging in the numbers you know and finding k. "e" is 2.718.....there is a button on scientific calculators which will give you the precise value of "e".
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  3. #3
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    so do i have to do like this? :
    B/1000 et= k?
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  4. #4
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    Quote Originally Posted by alessandromangione View Post
    the number of bacteria present in a culture after t minutes is given as B = 1000e^kt. if there are 3448 bacteria present after 7 min...find k
    Your last sentence contains B and t. Use those to find k in your equation B = 1000e^kt

    To reduce the powers of your equation, use a natural log function (ln)
    i.e. to find k in the equation B = e^k take the (ln) of both side which yields ln B = k
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