Answers to General Maths Exam (2 Viewers)

[hanna91]

did anyone get the answer right to question 27 b(i) no one in my class could prove it was $2178.67?

 

[ccc123]

What are the time zones that are being ignored then? It threw me, because local time kind of implies that you're taking time zones into account, but I can't work out what it meant otherwise.

Like, for example, say Place A has the co-ordinate 150 degrees E and Place B has the co-ordinate 155 degrees E. In mathematical terms, Place A is GMT + 10 and Place B is GMT + 10.3. Therefore, there is a difference in their times.

However, if you take into account time zones, it is likely that because tehy are so close together, they would be in the same time zone and therefore have the same time. The paper asked us to ignore this possibility.

 

[JosephW]

Yes. I just freaked out because I'd ignored the time zones, and no one else on here seemed to have done so, so I got my copy of the paper. Anyone who added a 5 hour time difference is in fact wrong - it's 7am, not 12pm.

Also, did anyone else find it impossible to prove 28bi? I tried everything I could think of, and couldn't get it to work out, and there are at least 3 other people in my class who had the same problem.

Ignore time zones as in the flight took 9 hours regardless of which time zone it left etc.. You had to convert the time.

 

[JosephW]

did anyone get the answer right to question 27 b(i) no one in my class could prove it was $2178.67?

Theres a little formula i like to call present value formula!

 

[savio23q]

Yeah that thing

I just worked M out and showed them. Hope thats enough for 2 marks =\

 

[zimmy808]

ok i got 92%

 

[bensta666]

what did you get for 25) b.

 

[robyn7]

ok i got 92%

smartass!

 

[michael1990]

Hi guys. I've really ripped through the paper so there might be a few errors. Let me know. I'll try and put my worked solutions up tonight or tomorrow.

Anyway ... it's all over now. Forget about it move on to your next exam!

-----
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) $78431.20
(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

Looking at these questions, i did better than what i first thought. YES!
I got question 28 (B) i) and ii) CORRECT WOOO HOOO

 

[Kiim2507]

I think I got 28 (b) i right but ii wrong
I said it decreases by half =\

 

[michael1990]

I think I got 28 (b) i right but ii wrong
I said it decreases by half =\

I knew i got the Sphepical Geometry right as well.

Risole and i were arguing about it at the library today, and some other bloke got the same answer as Risole.

Phew, one more exam to go
Then i can burn baby burn.

 

[bassist206]

hey thanks for putting up your answers..

28 a) v) (2) isnt girls have a growth spurt, its that the formula is a straight line, and the graph isnt a straight line, so after age 12 if you keep going you get rididulous answers. dont worry, i said the same sort of thing

Also for multiple choice 3) we had a question like that in another assessment and kids and teachers fought over whether the answer was 24 (because thats what N actually represents) or whether it was just 4 (because thats what goes in that place) so they had to give us both marks. i cant decide myself, but i put 24.

and for 15) i say he doesnt pay interest on the deposit, so it shouldnt have been added to your answer of $3200.. i believe the answer is A.

thankyou for uploading them though, youre putting my mind at ease..i just wanted to get over 90 lol.

 

[Sezza08]

Where did you get your answers from??

 

[lhewitt1]

ohhhhh thank you so much for posting up the answers!!
i was really worried when i came out of the exam.. as were the majority of my classmates. but seeing as though im normally near the top of the class i was extra worried...

when i got 1/2 way through the exam i looked at the questions and seriously almost started crying. if not for the noise restriction i think i would've.

but thanks =] from the answers you posted it seems i got at least 80%

 

[bassist206]

oh also,
23 c) ii) it cant be 3.9mL/min because then if you times that by 60 its like 234mL an hour... not 20.625mL.. i believe the answer is like 0.2148...

let me know if im doing something wrong though, once i get an answer into my head its hard to see other ones, thanks

 

[jcsmith]

Ah.. crap. Looknig at those answers is'nt very reassuring - It was pretty hard.
Plus me sneezing every 5 minutes didn't help. Fine before I got it there!

Worst question had to be that one about the cheese. Damn cheese.

Alot of people noticed- there were fewer questions about algebra- as in past exams.


Oh well - time too stress about legal.

 

[Sezza08]

oh also,
23 c) ii) it cant be 3.9mL/min because then if you times that by 60 its like 234mL an hour... not 20.625mL.. i believe the answer is like 0.2148...

let me know if im doing something wrong though, once i get an answer into my head its hard to see other ones, thanks

the 3.9mL/min is using the whole drink (375mL) as a beginning measurement. The measurement you've used is the alcohol/min measurement.

not sure exactly what they wanted....i did the 3.9mL/min measurement...

 

[UNZPME]

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[/quote]


i dont get QUESTION 28
(b) (i) A = h/3[8a + 2b] = 2h/3[4a + b]
(ii) Decreases by 8 m

plz explian
eny1
i didnt xpect the exam 2 be lik this lol evn thou i been practicing my ass offff oh wel hope i get in the 80s

 

[jcsmith]

did anyone get the answer right to question 27 b(i) no one in my class could prove it was $2178.67?

You use the annuties formula.


N=M [(1+r)^n-1]
r(1+r)

I think that's right.

Or close to it.

 

[michael1990]

oh also,
23 c) ii) it cant be 3.9mL/min because then if you times that by 60 its like 234mL an hour... not 20.625mL.. i believe the answer is like 0.2148...

let me know if im doing something wrong though, once i get an answer into my head its hard to see other ones, thanks

375mL = 1.6 SDs
1SD = 234.375mL
234.375mL / hour
= 3.90625mL / min

It is correct.