Well- far as the hardest question on the paper I'd have to say question 9- question 8 was really interesting and question 10 (most of it anyway) was do-able. So yeah, question 9 was the hardest.
Ok- with regard to question 8 of the 2 unit exam- for the area with the parabola- I got 652 for one and 592 for the other- very strange answers- hopefully they were right. Interesting question though eh?