So it's going to be divided by, well, you're going from zero to 10, so 10 minus zero is going to be equal to 10. And if you wanted the intuition here, it's like, well, if you know the area of something, and if you wanted to find its average height, you could just divide by its width, and that's what we're doing here. If we know the area of something, we want to figure out its average height, and so you divide by its width. That's, I guess, a very high level intuition for where this expression came from. And so this is going to be equal to 1 tenth times the integral from zero to 10, and b of t is t to the third power minus 6t squared plus 300 dt. And so this is going to be equal to 1 over 10. Take the antiderivative here, so this is going to be t to the fourth over 4, t to the fourth over 4.