Professor Kate Poirier | D071 | Fall 2023

Project #1: Section 4.1, Problem 13: Ethan Lo and Emily Murphy

3 Comments

  1. Qing Chen(Charlotte)

    I liked how you clearly explained each step in setting up and solving. Breaking it down into finding the general solution first, and then plugging in the initial values to get the particular solution made it easy to follow.

    My only question is in the last step when solving for t – why did you write ln(100) = 2ln(10)? I’m not sure where the 2ln(10) came from. Overall though, the solution looks solid!

    • Emily Murphy

      Thanks so much for your feedback! $ln(100)=2ln(10)$ is actually just a logarithmic property. We used it there so we can cancel out the $ln(10)$ on both sides of the equal sign in the next step.

  2. Phoebe Narcisse

    1. Your video was very well thought-out and I could clearly understand each step and why you were doing it. I especially like how you guys used a whiteboard so we could follow along the problem solving in real time!
    2. I have no questions, it was a well-executed project!

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