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Math Help - Logarithms and exponential models

  1. #1
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    Logarithms and exponential models

    Hello, I am currently a bit confused regarding two problems.

    1. Q= 40e^ (t-5)/12

    2. Q= 2e^ (1-3t/4)

    Directions tell me to find the values of a, r, and k. For some reason I am finding these two particular problems somewhat tricky.

    Any help and feedback would be appreciated, thanks.
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  2. #2
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    Quote Originally Posted by Gitano View Post
    Hello, I am currently a bit confused regarding two problems.

    1. Q= 40e^ (t-5)/12

    2. Q= 2e^ (1-3t/4)

    Directions tell me to find the values of a, r, and k. For some reason I am finding these two particular problems somewhat tricky.

    Any help and feedback would be appreciated, thanks.
    The wording of your question is kind of cryptic. So I'm guessing:

    The general equation of exponential growth is:

    \underbrace{a}_{amount} = \underbrace{k}_{start\ value} \cdot ~ e^{\underbrace{r}_{rate}}

    to #1:

    a = Q, k = 40, r = \dfrac{t-5}{12}

    I'll leave the rest for you.
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  3. #3
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    Thanks for the feedback.

    Seems a lot simpler than i thought.
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