Lmao same as I was very proud of myself when I squared 27, for the last question on calculator I realised how to do it with 2 mins left and no space in my test from all the scribbles, wrote it down with very little explanation towards what I was at, hopefully they will be nice enough to give me atleast 3 lmao??
Was pretty sure the last question was mathematically impossible considering you had to use Pythagoras to work out l to work out the surface are and it just didn't work! But other than that T6 was fine☺️
What was the last question again? I've totally forgot it😂
What was the last question again? I've totally forgot it😂
A solid cone of base radius 4x and height 3x has the same surface area of a sphere of radius y. Prove that 3x=y. I'm pretty sure that was it - if it wasn't I (failed to) answered a completely different question!
A solid cone of base radius 4x and height 3x has the same surface area of a sphere of radius y. Prove that 3x=y. I'm pretty sure that was it - if it wasn't I (failed to) answered a completely different question!
Do u know the correct solution for the last question? I want to see if I got it right
This is what I did, but not 100% sure if I'm right! Surface area of cone = Surface area of sphere. Pi x r x l = 4 x pi x r^2 Pi x 4x x 3x = 4 x pi x (y)^2 12x^2 x pi = 4y^2 x pi. (Cancel out the pi) 12x^2 = 4y^2 3x^2 = y^2. (Square root both sides) 3x = y
If I'm wrong you can correct me
I think you can't take l as 3x. It would have been the hypotenuse on the cone: sq root of (3x)^2 + (4x)^2 = 25x^ l=5x ... I think! Not hundred percent on that but thats what I did. If it was what you did that would have been a lot simpler and maybe that bit more obvious!
Urghhh I'm realising now I've made a bunch of silly mistakes. Did you have to work out the perimeter of the smallest octagon? I only worked out the length of one of the sides The last question I had the correct formula but forget to square the number terms (I only squared the Xs) when I was doing Pythagoras' but I'll hopefully still get some marks for correct working. I got 290/1320 for the probability but it didn't ask for a simplified form so hopefully that's ok. Am I the only one who took forever to work out how to do the question asking you to work out the area of the quadrilateral haha, once I got it I couldn't believe it took me so long
What I eventually did for the last question is said that y=3x and 3x=height so 7x-4x = 3x (Pythagoras) which somehow seemed to prove it in the exam. However I'm not too worried as I think I got 80+ raw marks in t4 and hopefully 85+ in the two t6 so should be grand
What I eventually did for the last question is said that y=3x and 3x=height so 7x-4x = 3x (Pythagoras) which somehow seemed to prove it in the exam. However I'm not too worried as I think I got 80+ raw marks in t4 and hopefully 85+ in the two t6 so should be grand
Urghhh I'm realising now I've made a bunch of silly mistakes. Did you have to work out the perimeter of the smallest octagon? I only worked out the length of one of the sides The last question I had the correct formula but forget to square the number terms (I only squared the Xs) when I was doing Pythagoras' but I'll hopefully still get some marks for correct working. I got 290/1320 for the probability but it didn't ask for a simplified form so hopefully that's ok. Am I the only one who took forever to work out how to do the question asking you to work out the area of the quadrilateral haha, once I got it I couldn't believe it took me so long
Same! I was so confused by the quadrilateral question until I had like 5 mins left during the exam and I happened to glance at it again and realised what I had to do
It's very hard to say because it's not actually the raw marks that count they use a formula to change them into actual marks but the grade boundary for a* is usually 75-80% so 150/160 should be fine but again they do something to the marks so I'd not spend too long thinking about it