Suggested answers EXAM 2(Core, geometry / trig, business maths and networks)

[Tonychet2]

this is only suggested and not final - feel free to dispute or contribute exam paper here --> Further 2012 EXAM 2 copy

Core
1a) 20 degrees
b) 23.3%
c) 97.5%

2a) draw a straight line that is from (0,13) to (20,26.4)
b) when the minimum temperature is 0 degrees, the maximum temperature is 13 degrees (or similar)
c) the relationship between the minimum temperature and maximum temperature is a moderate positive relation (or similar)
d) max temperature = 0.67 * minimum temperature
e) -8 degrees

3a) south east
ii) north east
b) 2 2 2 3 4 4 4 4

4a) 3.4 and 6.6
b) 13km/h


Geometry and trig
1a) 4250 m^2
b) 1000m^3
c) 90.6m

2a) 12 metres
b) draw a line from (P, 2) to (Q, 14) ---- I drew a line from (Q,0) to (Q,14) this may be required or drawing this may make the answer wrong --- need clarification
c) 132 degrees -- clarification needed
d) 222 degrees

3a) Use the sin rule
b) 16.9m

4a) 8.66m
b) 21.7m^2
c) 68.6m^2
d) 43 degrees, use the cos rule to get length of the last side, then use the cos rule again to get angle

Business maths

1a) $1254
b) $7106
ii) $694
c) $7600

2a) $5852
b) 10% of 8360 is $836 , the unit cost deprecriation per year is 3800*0.22 which is also $836 (or similar)
c) 10 years
d) $1850

3a)$807.23
b) 47 months
c) 40000 * (1 + 7.8/1200 ) ^12 = $43234
ii) $281.02

4a) 6.3%
b) $80000
c) $35208

Networks and decision maths

1a) 160 m
b) 2
c) 1250m

2a) 12 days
b) Activity B must be completed before activity G and H can commence (or similar)
c) 15 days
d) A B H I L M
e) 25 days

3a) 17
b) for an optimal allocation the minimum number of lines required to cover all the zeros must be equal to the number of rows, in this case there are 3 lines used instead of 4 (or similar)
c) matrix should like

3,3,7,3
5,5,3,13
4,6,3,3
10,3,6,8

and

0,0,4,0
2,2,0,8
1,3,0,0
7,0,3,5

Julia = task W
Ken = task Z
Lana = task X
Max = task Y

enjoy

[StumbleBum]

Business:
1.a)
1.b)i
1.b)ii
1.c)

2.a)
2.b)   and 
2.c)
2.d)

3.a)
3.b)
3.c)i
3.c)ii

4.a)
4.b)
4.c)

[Tonychet2]

Business:
1.a)
1.b)i
1.b)ii
1.c)

2.a)
2.b)   and 
2.c)
2.d)

3.a)
3.b)
3.c)i
3.c)ii

4.a)
4.b)
4.c)

haha sorry, I accidently wrote matrices in the title of the thread instead of business maths woops !

[StumbleBum]

haha sorry, I accidently wrote matrices in the title of the thread instead of business maths woops !

Ah, well that was a waste then haha. By the way your 3.c)ii is wrong.

[Tonychet2]

haha sorry, I accidently wrote matrices in the title of the thread instead of business maths woops !

Ah, well that was a waste then haha. By the way your 3.c)ii is wrong.

oh shit didnt read the question properly.. FFFFFFFFFFFFFFUUUUUUUUUUU VCAA

[andylan1]

this is only suggested and not final - feel free to dispute or contribute

Core
1a) 20 degrees
b) 23.3%
c) 97.5%

2a) draw a straight line that is from (0,13) to (20,26.4)
b) when the minimum temperature is 0 degrees, the maimum temperature is 13 degrees (or similar)
c) the relationship between the minimum temperature and maximum temperature is a moderate positive relation (or similar)
d) max temperature = 0.67 * minimum temperature
e) -8 degrees

3a) south east
ii) north east
b) 2 2 2 3 4 4 4 4

4a) 3.4 and 6.6
b) 13km/h


Geometry and trig
1a) 4250 m^2
b) 1000m^3
c) 90.6m

2a) 12 metres
b) draw a line from (P, 2) to (Q, 14) ---- I drew a line from (Q,0) to (Q,14) this may be required or drawing this may make the answer wrong --- need clarification
c) 132 degrees -- clarification needed
d) 222 degrees

3a) Use the sin rule
b) 16.9m

4a) 8.66m
b) 21.7m^2
c) 68.6m^2
d) 43 degrees, use the cos rule to get length of the last side, then use the cos rule again to get angle

Business maths

1a) $1254
b) $7106
ii) $694
c) $7600

2a) $5852
b) 10% of 8360 is $836 , the unit cost deprecriation per year is 3800*0.22 which is also $836 (or similar)
c) 10 years
d) $1850

3a)$807.23
b) 47 months
c) 40000 * (1 + 7.8/1200 ) ^12 = $43234
ii) $280.02

4a) 6.3%
b) $80000
c) $35208

Networks and decision maths

1a) 160 km
b) 2
c) 1250m

2a) 12 days
b) Activity B must be completed before activity G and H can commence (or similar)
c) 15 days
d) A B H I L M
e) 25 days

3a) 17
b) for an optimal allocation the minimum number of lines required to cover all the zeros must be equal to the number of rows, in this case there are 3 lines used instead of 4 (or similar)
c) matrix should like

3,3,7,3
5,5,3,13
4,6,3,3
10,3,6,8

and

0,0,4,0
2,2,0,8
1,3,0,0
7,0,3,5

Julia = task W
Ken = task Z
Lana = task X
Max = task Y

enjoy

NICE WORK, you missed the answer for geometry and trig, 3a) i think it is 41.81

[Jordzs]

In Networks 2b, it is fair to say that a dummy activity is an edge added on to avoid two or more activities having the same name?

[Tonychet2]

thnx, yeah i meant use the sin rule to show its 41.81 lol

[jmonte12]

Hi for 2b in business I wrote the amount that the item would be worth so 7524 but used both methods correctly.  Would this still get full marks? Otherwise I'm pretty sure the rest are completely right.

[OnlySteven]

can the critical path be A B Dummy H I L M ?

[Tonychet2]

Hi for 2b in business I wrote the amount that the item would be worth so 7524 but used both methods correctly.  Would this still get full marks? Otherwise I'm pretty sure the rest are completely right.

jmonte12 - no because its a 1 mark question u only get the mark right if u get the answer right

onlysteven - yes that should be accepted

[jmonte12]

Hi for 2b in business I wrote the amount that the item would be worth so 7524 but used both methods correctly.  Would this still get full marks? Otherwise I'm pretty sure the rest are completely right.

jmonte12 - no because its a 1 mark question u only get the mark right if u get the answer right

onlysteven - yes that should be accepted

Damn, there goes my 50 :/

[OnlySteven]

sick, thanks dude also, for 3b in networks

could you say: Not all workers have a clear task to complete with minimum time?

[Tonychet2]

sick, thanks dude also, for 3b in networks

could you say: Not all workers have a clear task to complete with minimum time?

probably not tbh its very ambiguous the way u wrote it

[OnlySteven]

sick, thanks dude also, for 3b in networks

could you say: Not all workers have a clear task to complete with minimum time?

probably not tbh its very ambiguous the way u wrote it

ah well, thanks for the response dude