So the change in temperature over those 10 minutes is just the definite integral from zero to 10 of this business right over here. Of, let me just write it so you see it's the exact same pattern as what we saw over here. This was for the cookies, now we're talking about the biscuits. And this right over here is going to be the definite integral from zero to 10. B prime of t, they give it to us right over here, is negative 13.84 e to the negative 0.173 t dt. And now we just evaluate this. So we can, let's take the, well, we can evaluate this.