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Edexcel maths 11 June 2012 unofficial mark scheme

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hey guys, what are your views on this..
I wrote for the area of the triangle 31. something, because I used the wrong angle which wasnt opposite to the correcnt length. I then went on to use 1/2absinC and worked out the area. How many makrs will I get?

Also for the the conversion one about potatoes, I got the wrong conversion. I divided 9 pounds by the amount and got 0.38888 and for the other one i got 0.3623847. How many marks will I get here?

And finally for the water tank one, I had no clue but I worked out the average pay for one day by doing 0.9112 x 180. Will I get one mark? thanks a bunch!