17. The rate at which a quantity \( B \) of a certain substance decays is proportional to the amount of the substance present at a given time. Which of the following is a differential equation that could describe this relationship?
Answer is: option3 - \( \frac{dB}{dt} = -0.32B \)
Solution:
\( \frac{dB}{dt} = -0.32B \)
