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# C34 June 2016 Model Answer

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1. Here is the model answer for C34 June 2016 paper.
2. I think that most of the questions were straightforward although the paper was a little bit lengthy
3. (Original post by koli248)
Here is the model answer for C34 June 2016 paper.
Hi, thank you very much for these.

I do feel your #2 is wrong, though - dy/dx at P is , so shouldn't there be a - sign?

Also, for 10(b) they asked for exam form.

Do you think I'd lose a mark for giving my answer for the last one as 11.63 without the units?
4. You're welcome
yes you're right I've corrected it

No I think you won't lose a mark.
5. Just did the paper and realised your question 13C is wrong.
you went from ln(h)+10ln(30-h)=-t +ln(k) to 10ln(h^2(30-h)) = -t +ln(k), you accidentally made it h^2 inside the ln
6. I got t=9.40(2dp)
7. (Original post by Nerrad)
I got t=9.40(2dp)
Pretty sure his answer is correct - I got the same one integrating with limits
8. (Original post by Nerrad)
Just did the paper and realised your question 13C is wrong.
you went from ln(h)+10ln(30-h)=-t +ln(k) to 10ln(h^2(30-h)) = -t +ln(k), you accidentally made it h^2 inside the ln
It is 20ln(h) not ln(h). Thats why it became 10ln(h^2).
9. (Original post by Ayman!)
Pretty sure his answer is correct - I got the same one integrating with limits
Oh my bad! Didn't realise 20 had turned into 10 to make it h^2
10. (Original post by koli248)
It is 20ln(h) not ln(h). Thats why it became 10ln(h^2).
My bad, thanks for correcting

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