Which has a higher order of growth n(n+1) or 2000n^2?

Question

I think they have the same order of growth because both are O(n^2), correct? And even though 2000n^2 has a higher coefficient, they're both the same complexity since O(n) < O(n^2) < O(n^3) is this thinking correct? If not, how can I understand their order of growth better?