General Thoughts: Mathematics (3 Viewers)

[barbernator]

So is it (pi)(h^2)/2........or.......(pi)(h^3)/3

for the volume of the parabola or cylinder?

 

[umz93]

I think it should be (pi)(h^2)/2 but i may be wrong, heres hoping we get some marks regardless.

 

[barbernator]

I think it should be (pi)(h^2)/2 but i may be wrong, heres hoping we get some marks regardless.

Yeh i agree, because you are integrating pi y dy, because x^2=y already. so it should be (pi)(h^2)/2

 

[barbernator]

and hence the ratio was 1:2??

 

[MrBrightside]

I found it ok easier than expected but hated q 9 and found it weirder than normal since most of marks were 1 wth? If I get 108/120 and considering I come from malek Fahd Islamic school would I get 90 + ?

ahaha I know right. Especially since qs 1 a) was worth 2 marks and can be done in 2 seconds, and then you end up spending like 10 min on 3 qs worth 1 mark each :S

 

[OmmU]

i dunno. i got (pi)(h^2)/2...

no, it increased by 6.3%

I got both of those.

 

[maxgilbert]

I missed 10 b) iv) and v) because it was hard. TBH, I guessed part 3 but apparently it's right. r= P/4 ?


for 9 c) graphic, I think I'll lose 1 mark because I made the graph go above the x axis at the end....

9 b) ii) I failed. I don't know if I did i) right.


8 c) ii 2) was wtf.......... ??? did anyone get $1451 or something

yehh we had the samee answers 1451.84 or something and 9) c is right aswell

 

[jmel93]

I think I got around 76% as a raw mark, does anyone know what this will scale to?

 

[barbernator]

I think I got around 76% as a raw mark, does anyone know what this will scale to?

88~

 

[chloe555]

and hence the ratio was 1:2??

yeah this is what i got

 

[umz93]

yeah this is what i got

Same, thank god BOS give marks for working out.

 

[jung1239]

I think I got around 76% as a raw mark, does anyone know what this will scale to?

88~

Depends on your rank though and how well your cohort does.

 

[m1k]

I think Kim needs to get more variety in shirts :/ Does anyone know how you solve Q5 (iii) ?

I think I got approx. 116/120 with the only errors made in that question above and 9d(ii)

 

[OmmU]

I think Kim needs to get more variety in shirts :/ Does anyone know how you solve Q5 (iii) ?

I think I got approx. 116/120 with the only errors made in that question above and 9d(ii)

i) 0.6
ii) 0.1
ii) 0.3

http://community.boredofstudies.org/showthread.php?t=268945

 

[forkandspoon]

omg, just realised that the 1 marker for y=2cosx graph asked for the COORDINATES of the point at the y axis. I only wrote '2', not (0,2)... do you still think i can get that 1 mark?

 

[m1k]

i) 0.6
ii) 0.1
ii) 0.3

http://community.boredofstudies.org/showthread.php?t=268945

Okay thank you. I was doing something weird with P = 1 - {not consecutive days} but it ended up being wrong anyway with 1/3 :/

 

[shakky]

what mark would 79-82/120 align to?

 

[someth1ng]

Does anyone know how you solve Q5 (iii) ?

I think you do 0.5*S12 = 55283cents --> $552.83

Atleast that's what I got.

 

[someth1ng]

what mark would 79-82/120 align to?

Probably about 84 exam mark.

 

[m1k]

I think you do 0.5*S12 = 55283cents --> $552.83

Atleast that's what I got.

Oh I meant 5.b.(iii) sorry. I thought I had implied the probability one from my stupid remark about her shirts xD But it's okay, I've found the answer, thank you