We probably did this earlier in pre-calculus or algebra class. But let's just do it again just so we can feel that this thing right over here is useful. So let's give you some information. Let's say that at time equals zero, the population is equal to 100 insects or whatever we're measuring the population of. And let's say that at time equals, let's say at time equals 50, the population, so after 50 days, the population is 200. So notice it doubled after 50 days. So given this information, can we solve for C and K?