Thanks for the speedy answers.
I have a few queries;
for question 3. I got x=-3 as opposed to x=3
for 5ii I got 2^(13/3) maybe I made a mistake
on 8ii I put "The gradient of AB when h=0 is 20. The gradient of the curve when x=5 (at A) is equal to 20." how many marks would you say this got (if any!)?
would I still get full marks for 8iii for 1005/20 (which = 201/4)?
10iv I only put r<3(sqrt(5))-5 so I guess I lost a mark there
Thanks for spending your time to answer