And so you can see, expressed this way, our C is always going to be our initial population. So E to the KT, E to the KT. And now we can use the second piece of information. So our population is 200. Let's write that down. So our population is 200 when time is equal to 50, after 50 days. So 200 is equal to 100E, 100E to the K times 50, right?