Login | Register

Welcome, Guest. Please login or register.

July 12, 2020, 12:50:16 am

Author Topic: HSC Maths Advanced - 25/10/19 - Discussion, Questions & Potential Solutions  (Read 4493 times)

0 Members and 1 Guest are viewing this topic.

Joseph41

  • Administrator
  • Great Wonder of ATAR Notes
  • *****
  • Posts: 10214
  • Oxford comma, Garamond, Avett Brothers enthusiast.
Post all exam discussion, questions, and sample solutions for Maths Advanced here!
« Last Edit: October 09, 2019, 04:27:24 pm by Joseph41 »

lace02

  • Adventurer
  • *
  • Posts: 17
How did everyone go?!

KingTings

  • MOTM: JULY 19
  • Forum Regular
  • **
  • Posts: 61
  • "I'll do it later.."
How did everyone go?!

I didn't think it was too bad, yourself?
I made dumb mistakes throughout a bit of 14-16, but overall I'm hoping for around 90ish raw.
What does everyone thing the b6 cutoff and scaling will be like this year?

Someone already put up the paper lol
« Last Edit: October 25, 2019, 08:12:00 pm by KingTings »
HSC 2019
Business Studies - Economics - Physics - English Adv. - Maths Adv.

ATAR:
Aim = 92+, Actual = 97.1 ;D

RuiAce

  • ATAR Notes Lecturer
  • Honorary Moderator
  • Great Wonder of ATAR Notes
  • *******
  • Posts: 8745
  • "All models are wrong, but some are useful."
Note: If NESA requests this to be taken down, I'll be forced to comply. Juggling MX2 alongside this. Please point out any mistakes.

(Click on an image to resize it!)

Questinos 11, 12 and 14 kindly donated by fun_jirachi

Multiple choice


Question 13




Question 15


Question 16


« Last Edit: October 26, 2019, 09:59:31 am by RuiAce »

KingTings

  • MOTM: JULY 19
  • Forum Regular
  • **
  • Posts: 61
  • "I'll do it later.."
Note: If NESA requests this to be taken down, I'll be forced to comply. Mostly gonna go backwards for now, but I'm also gonna juggle MX2. Please point out any mistakes.

Question 16

Thanks so much Rui!!!

For 16 b, would the height be pi/4 or pi/2? And hence it would be pi/12(y0 + ylast 4yodd) ? cause I got 1.53 rip pls tell me I didn't make a big oopsie xD
HSC 2019
Business Studies - Economics - Physics - English Adv. - Maths Adv.

ATAR:
Aim = 92+, Actual = 97.1 ;D

RuiAce

  • ATAR Notes Lecturer
  • Honorary Moderator
  • Great Wonder of ATAR Notes
  • *******
  • Posts: 8745
  • "All models are wrong, but some are useful."
Thanks so much Rui!!!

For 16 b, would the height be pi/4 or pi/2? And hence it would be pi/12(y0 + ylast 4yodd) ? cause I got 1.53 rip pls tell me I didn't make a big oopsie xD
Oh yikes haha definitely \( \frac\pi{12}\)! Thanks :D will edit that later

RuiAce

  • ATAR Notes Lecturer
  • Honorary Moderator
  • Great Wonder of ATAR Notes
  • *******
  • Posts: 8745
  • "All models are wrong, but some are useful."
Apologies for the slowness. This is surprisingly hard juggling two subjects simultaneously!

Husky

  • Adventurer
  • *
  • Posts: 10
Isn’t question 13 part (a) = sinx(cosx-1) as opposed to how you factorised it?
I could be wrong though

abdulrahmanb8

  • Adventurer
  • *
  • Posts: 15
Yeah I saw that! Also for part b) it should be minus 2 × 20 ×20
Isn’t question 13 part (a) = sinx(cosx-1) as opposed to how you factorised it?
I could be wrong though

Husky

  • Adventurer
  • *
  • Posts: 10
Also wouldn’t the final answer to the financial question be 24 not 25? Because the question asks how many times can a FULL withdrawal of $80000 be made. So instead of rounding up the final answer for n, shouldn’t it be rounded down?

fun_jirachi

  • MOTM: AUG 18
  • HSC Moderator
  • Forum Leader
  • *****
  • Posts: 654
  • All doom and Gloom.
Isn’t question 13 part (a) = sinx(cosx-1) as opposed to how you factorised it?
I could be wrong though
It's fine as written :)
Yeah I saw that! Also for part b) it should be minus 2 × 20 ×20
That's either okay, or since been corrected :)
Also wouldn’t the final answer to the financial question be 24 not 25? Because the question asks how many times can a FULL withdrawal of $80000 be made. So instead of rounding up the final answer for n, shouldn’t it be rounded down?
Yes, you're right here! Definitely should be 24, not 25.

The solutions to the remaining questions are here:
Two notes: a) Click to expand the photo! b) Let me know if there's anything you can't actually read (either my handwriting/photo quality)
Question 11

Question 12


Question 14



Failing everything, but I'm still Flareon up.

HSC 2018: Modern History [88] | 2U Maths [98]
HSC 2019: Physics [92] | Chemistry [93] | English Advanced [87] | Maths Extension 1 [98] | Maths Extension 2 [97]
ATAR: 99.05

UCAT: 3310 - Verbal Reasoning [740] | Decision Making [890] | Quantitative Reasoning [880] | Abstract Reasoning [800]

Quick Link to Guides:
Subject Acceleration (2018)
UCAT Question Compilation/FAQ (2020)

THSCStudyOnly

  • Adventurer
  • *
  • Posts: 13
Thanks for the solutions!
 fun_jirachi I think you may have made an error for Q12 Ciii and Q 12 d

Q12 C iii)
Shouldn't it be 54 days, subbing this into L(t) gives 119 leaves, whereas subbing 55 days gives 91 leaves

EDIT: Is this because there is 100 trees at 54.3 days. Thus it needs to be day 55 for there to be less than 100 leaves. If so I wrote 54 in the exam (I had the decimal places above, do you think I will lose a mark?). Although there aren't 100 leaves for either 54 or 55 so shouldn't it have been left as a decimal?


Q 12d
The answer should be (3/2)In(10)
« Last Edit: October 26, 2019, 09:23:26 am by THSCStudyOnly »

THSCStudyOnly

  • Adventurer
  • *
  • Posts: 13
RuiAce,
I think you have a error for 13b)
The 70pi/9 = 24.4 so the perimeter has to be larger...
I get around 47.37cm

Also what do you think 90-92 raw mark will align to?  :)
« Last Edit: October 26, 2019, 09:30:18 am by THSCStudyOnly »

RuiAce

  • ATAR Notes Lecturer
  • Honorary Moderator
  • Great Wonder of ATAR Notes
  • *******
  • Posts: 8745
  • "All models are wrong, but some are useful."
There were some corrections I implemented later last night but didn't post to confirm that I had. Will address the remainder now.

Q16 - with the finance, totally did't register the wording last night, oops

Husky

  • Adventurer
  • *
  • Posts: 10
So what do you guys think the band 6 cut off will be?