So if you wanted that, want the w though, you'd solve this. Now another option, you could say, okay, we know w is going to be greater than 8, so you could say, okay, how much water do we have right at time equals 8? We figured that out in the last problem. And so you could say we, at time equals 8, we have that much, 48.544. This is an approximation, but it's pretty close. Plus the amount of water we accumulate between time 8 and time w of r of t minus d of t, dt, is equal to 50. Either one of these would get you to the same place.