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    The number of bacteria present in a culture is modelled by y = yoe^(kt), where k>0 and t is the number of hours after 12 noon. At 1:00 pm the bacteria has doubled.

    a) According to the formula how many bacteria are present at 12 noon?

    How do you work this out?
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    (Original post by Custardcream000)
    The number of bacteria present in a culture is modelled by y = yoe^(kt), where k>0 and t is the number of hours after 12 noon. At 1:00 pm the bacteria has doubled.

    a) According to the formula how many bacteria are present at 12 noon?

    How do you work this out?
    t is the number of hours after 12 noon. So the number of bacteria present at 12 noon would be when t=0.
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    YInitial=yo
    Ydouble=yoe^K
    Ln2y/y=k
    K=ln2
 
 
 
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Updated: January 12, 2017
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