# General Thoughts: Mathematics (1 Viewer)

#### Neologism

##### Member
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
yep I got something like that for the \$

#### Neologism

##### Member
fml just found 10 marks i could have gotten + im bound to get silly mistakes .....fkn spewing .

you guys reckon the band6 exam cutoff will go higher or lower this year??
Don't worry, I'm in the same boat as you

#### ilovesilly

##### New Member
I believe that's right. How'd you do it?

well for part i you wouldve gotten root (n+1) - root (n)

so if you wrote out your first few terms youd get something like

root2 -root1 + root3 - root2 + root4-root3 .........root98 -root 97 + root 99-root 98 +root 100 - root99

so all numbers except for -root1 and root 100 would get cancelled so you get -1+10 = 9

#### Awkward_Ninja

##### Member
well for part i you wouldve gotten root (n+1) - root (n)

so if you wrote out your first few terms youd get something like

root2 -root1 + root3 - root2 + root4-root3 .........root98 -root 97 + root 99-root 98 +root 100 - root99

so all numbers except for -root1 and root 100 would get cancelled so you get -1+10 = 9
Is this d)ii)?
I think i ended up using the sum of an arithmetic series (and i'm beginning to suspect it wasn't) and got 23 point something.
I have a feeling it's wrong.

#### Entity

##### Member
'C' comes from the equation of the line x=c, to find volume around the y axis u need x^2, so x^2=c^2. Integrating this u get c^3 / 3 between o and h
But the equation was already y=x^2, you didn't to change it... you need pi (Integral) x^2, which would be just the integral of y times pi. Or have I stuffed up?

#### OmmU

##### ★ BoS Deity ★
But the equation was already y=x^2, you didn't to change it... you need pi (Integral) x^2, which would be just the integral of y times pi. Or have I stuffed up?
Yeah it was bound between the curve and y axis.. Therefore must be x^2 equals.. I started to make it y^2 equals but quickly realised

#### friend177

##### Member
What do you guys reckoned is the minimum raw mark cut off out of 120 for a band 5

#### miniwaybzz

##### Member
i honestly reckon it will be lower than last years

#### Entity

##### Member
Considering its about a 95 for last year, im saying it'd be a 90 - 93 for a band 6... Band 5 would be about 75 - 80?

#### friend177

##### Member
Considering its about a 95 for last year, im saying it'd be a 90 - 93 for a band 6... Band 5 would be about 75 - 80?
Uh..i'm looking at 80-90/120 seriously it all depends how the markers mark my answers....

#### Apurv

##### New Member
Easiest test in the world. Pretty sure 90-95% (band 6) and finished under 2 hours

#### Lis020393

##### New Member
How do you know the moderation of exam marks and stuff?
If you get a raw score of 105-110, what would be the moderated score/percentage?

#### friend177

##### Member
How do you know the moderation of exam marks and stuff?
If you get a raw score of 105-110, what would be the moderated score/percentage?
you don't. you assume.

#### determine

How do you know the moderation of exam marks and stuff?
If you get a raw score of 105-110, what would be the moderated score/percentage?
hi, I applied for my raw marks last year, and I received 108/120 in the HSC exam. My exam mark was 96. hope this helps give you a ball park figure, I'd be thinking between 94 and 97.

#### KGZ9

##### Member
can anyone tell me what a raw mark of 85-90/120 would align to?

#### friend177

##### Member
hi, I applied for my raw marks last year, and I received 108/120 in the HSC exam. My exam mark was 96. hope this helps give you a ball park figure, I'd be thinking between 94 and 97.
Did you apply for a raw mark for economics? If so what was it?

#### Awkward_Ninja

##### Member
hi, I applied for my raw marks last year, and I received 108/120 in the HSC exam. My exam mark was 96. hope this helps give you a ball park figure, I'd be thinking between 94 and 97.
Now to compare this, we need someone who applied for raw marks that got a band 5, and then use them as rough guides.

Raw mark of 90% gets scaled to 96% eh.
Depending on how maths turns out, i may or may not have to kiss my 88.00 goodbye.

#### dirtydiana

##### New Member
did anyone got that the Loudness increased by ln 2 for the loudness question?

Also was the sum of the series in q9 = to 9?
The sum of the series came out as (square root 100) - (square root of 1)....doesnt this have four answers.. (-9,9, 11, -11)??

#### barbernator

##### Active Member
The sum of the series came out as (square root 100) - (square root of 1)....doesnt this have four answers.. (-9,9, 11, -11)??
a square root cannot be negative, it is just 9

#### tess16

##### New Member
am i the only one who thought that test was BRUTAL! I ran out of time massively- only just finished and had no time to check. Compared to past papers i thought it was much harder!!