Answers to General Maths Exam (3 Viewers)

[PC]

2008 GENERAL MATHS HSC EXAM

SECTION I
1. A
2. C
3. A
4. D
5. B
6. B
7. D
8. C
9. A
10. D
11. B
12. A
13. C
14. B
15. B
16. D
17. A
18. A
19. B
20. D
21. B
22. C

SECTION II
QUESTION 23
(a) (i) Feb, Mar, Nov or Dec
(ii) Nov
(b) 0.4%
(c) (i) 20.625 mL
(ii) 3.9 mL/min
(d) x = 5
(e) 175 people
(f) 76%

QUESTION 24
(a) (i) $24445.20
(ii) Method 2
(b) (i) 60
(ii) 3/5
(iii) 24
(iv) 1/15
(c) $335 138.91

QUESTION 25
(a) (i) a = 6
(ii) 8 years
(b) (i) Probabilities on 2nd stage: 11/29, 18/28, 12/29, 17/29
(ii) 73/145
(c) (i) 41.04 cm x 21 cm x 15 cm
(ii) 506 cubic centimetres

QUESTION 26
(a) (i) 68
(ii) 6/25
(iii) Movie will not be a success as only 58% of critics liked the movie.
(b) (i) 7/400
(ii) Negatively skewed, clustered around ages 61-75
(c) Lose $22.50
(d) (i) 600 000
(ii) 35-39
(iii) 1 450 000
(iv) My first answer was: Those 75-79 would have been born during the Great Depression in the early 1930s.
A better answer is 80+ can include ages from 80 to 100 or more, so there will be more people in that range.

QUESTION 27
(a) (i) 8377 km (or 8334 km)
(ii) 9 hours
(iii) 12 pm Wednesday
(b) (ii) $784321.20
(iii) She will take 252 months, or 21 years, so will not be able to pay loan off in 20 years.
(c) $2800

QUESTION 28
(a) (i) 1
(ii) (1) 155 cm (2) 84%
(iii) 163 cm
(iv) 55.8 kg
(v) (1) Height increases by 6 cm per year (2) Around age 12, girls start "growth spurt".
(b) (i) A = h/3[8a + 2b] = 2h/3[4a + b]
(ii) Decreases by 8 m

 

[henry08]

Can you post the questions up as well please.

 

[taker0]

(iv) Those 75-79 would have been born during the Great Depression in the early 1930s.

wtf is this maths?? are they allwed to ask this lol. i said something about baby booming lol

 

[Roy9]

I think for question 28, v, 2, the answer was that they stop growing rapidly after age 12..... because the graph's line was beginning to plateau at that age and it's not like they're gonna continue growing 6cm a year for the rest of their life

 

[cait33]

(iv) Those 75-79 would have been born during the Great Depression in the early 1930s.

wtf is this maths?? are they allwed to ask this lol. i said something about baby booming lol

yeah i know!!!
i said something about WWII
but they would be at least 80 now gah!

 

["UserNamE"]

(iv) Those 75-79 would have been born during the Great Depression in the early 1930s.

wtf is this maths?? are they allwed to ask this lol. i said something about baby booming lol

i put that there is a bigger range for 80+ then 75-79 therefore more people

 

[olivegreentiger]

I think for question 28, v, 2, the answer was that they stop growing rapidly after age 12..... because the graph's line was beginning to plateau at that age and it's not like they're gonna continue growing 6cm a year for the rest of their life

agreed..

 

[cait33]

agreed..

+1

 

[8th1da]

i put that there is a bigger range for 80+ then 75-79 therefore more people

yah same.

As for question 27 (a) part i wouldnt the flight take 9 hours. as 8334/913 = 9 ??

 

["UserNamE"]

yah same.

As for question 27 (a) part i wouldnt the flight take 9 hours. as 8334/913 = 9 ??

yeh thats wat i had

 

[mermer]

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sersiously..i thought i failed that bitch of an exam but i checked what i wrote on me exam paper with what u wrote for answer (i wrote my answers on the booklet which we took home) and i calculated pretty much a rough 85....i'm feeling much calmer now sucks bout the last last question on the paper...it took me 15 minutes and in the end i wrote increas B by 8...argh! but i'm shocked that i got the rest of 28 right...that was a bloody hard section
anywayz, thankx for posting up your answers

 

[grkforlyf]

would 27 a) iii) be 12am wednesday?

got 9 hours for plane and 5 hours for time difference : 75x4=300 =5 hours?

 

[Roy9]

would 27 a) iii) be 12am wednesday?

got 9 hours for plane and 5 hours for time difference : 75x4=300 =5 hours?

Yep.

 

[PC]

yah same.

As for question 27 (a) part i wouldnt the flight take 9 hours. as 8334/913 = 9 ??

You're right. I'm so used to having the speed in knots, so I used nautical miles instead of km.

 

["UserNamE"]

would 27 a) iii) be 12am wednesday?

got 9 hours for plane and 5 hours for time difference : 75x4=300 =5 hours?

yeh i got that, do u mean 12 day time?

 

[8th1da]

and for question 23 (C) i if u have 3.9 ml a min
3.9*60 = 234ML of alco in an hour thats way over

 

[8th1da]

.

 

[8th1da]

yeh i got that, do u mean 12 day time?

yeh i got 12 pm (midday)

sorry about all the posts

 

[grkforlyf]

fuck i put am instead of pm

another mark gone

 

[PC]

and for question 23 (C) i if u have 3.9 ml a min
3.9*60 = 234ML of alco in an hour thats way over

I don't think (ii) is asking for the amount of alcohol per minute, but just the amount of "drink" per minute.

Rate = 375 mL/1.6 drinks
= 234.375 mL/1 drink
= 234.375 mL/1 hour (1 drink per hour)
= 3.90625 mL/min