Learning goals: Teacher Facing Comprehend that we can use $e^r$ as the growth factor of $f(t) = e^{rt}$ when we assume the rate $r$ is applied continuously. Interpret the parameters in the equations of exponential functions with the form $f(t)=P \boldcdot e^{rt}$. Full lesson plan (warm-up, activities, synthesis, cool-down prompt) from Alg2.4 Exponential Functions and Equations, Algebra 2.