And then the derivative of a constant, how does that change with respect to time? It's not gonna change, that is just going to be zero. So just like that, we were able to find the second derivative of h with respect to time. And now, what does this tell us? Well, we talked about in the previous video that over the interval that we care about, well, actually, I can show you from this graph. Over the interval that we care about, for t greater than zero, it says that our internal temperature is always going to be greater than 27. And so when you look at this expression here, or when you look at this expression here for dh dt, we talked in the previous video how this is always going to be negative here, because h is always going to be greater than 27, so that part's going to be positive, but then we're gonna multiply it by a negative 1 4th.