VCE General & Further Maths Question Thread!

[@#035;3]

Quick question

The rectangular prism shown above has a square end with an area of 36 cm^2 (Just a regular rectangular prism...)

The length of the prism is twice the width of the prism. Point M is the midpoint of AB.
Angle CMD is closest to
A. 25.3°
B. 35.2°
C. 35.3°
D. 45.2°
E. 45.3°

I got C is this correct??
Thanks in advance

[_fruitcake_]

If a critical path goes through a dummy activity, do we include the dummy activity as part of the critical path?

For example, is the critical path B-G-J-M-N
                                                           or
                                             B-dummy-G-J-M-N

bump

[BakedDwarf]

Quick question

The rectangular prism shown above has a square end with an area of 36 cm^2 (Just a regular rectangular prism...)

The length of the prism is twice the width of the prism. Point M is the midpoint of AB.
Angle CMD is closest to
A. 25.3°
B. 35.2°
C. 35.3°
D. 45.2°
E. 45.3°

I got C is this correct??
Thanks in advance

Is there a picture that comes with the question? Because I don't know where point C, M and D are.

[_fruitcake_]

If a critical path goes through a dummy activity, do we include the dummy activity as part of the critical path?

For example, is the critical path B-G-J-M-N
                                                           or
                                             B-dummy-G-J-M-N

The dummy of B would be classified as B'. Yes you include it as part of the critical path. Thus the critical path would be B-B'-G-M-N

[TheMereCat]

Is there a picture that comes with the question? Because I don't know where point C, M and D are.

Here's the question, coincidentally i have it lying around lol.

[Floatzel98]

Here's the question, coincidentally i have it lying around lol.

I got C as well. Should be correct

[@#035;3]

Ah thanks for that! Sorry I didn't have the picture with the question!

[RazzMeTazz]

Could someone please explain how to do the question attached below?

(The answer is E)

Thankyou!

[plato]

Could someone please explain how to do the question attached below?

(The answer is E)

Thankyou!

As printed, there is no correct answer to the question.
I suggest the difference equation is not meant to be
t_n+1 = 2t_{n - 1}
but
t_n+1 = 2t_n - 1 which would give E as the answer

[RazzMeTazz]

As printed, there is no correct answer to the question.
I suggest the difference equation is not meant to be
t_n+1 = 2t_{n - 1}
but
t_n+1 = 2t_n - 1 which would give E as the answer

Thanks, that makes sense!

[StupidProdigy]

Are we only expected to input integer values into objectives functions in vce?
Also with the 'sliding line' technique, why do we swap the coefficients of x and y at the start? thanksss

[plato]

Are we only expected to input integer values into objectives functions in vce?
Also with the 'sliding line' technique, why do we swap the coefficients of x and y at the start? thanksss

I don't think you should restrict yourself to only thinking in integer terms.For example, non-integer values in objective functions could be examined if an answer is wanted correct to the nearest cent.
I am guessing at what you might mean by swapping the x and y coefficients "at the start"?
If the objective function is, say, P=12x-3y, then the sliding line method is easier if you could rewrite this function in the form y=mx+c
So P=12x-3y would become y=4x-P/3
Then slide a line, with a gradient of 4, up as far as you can go, and still touch the feasible region, to maximise P or down as far as you can go to minimise P.

[StupidProdigy]

I don't think you should restrict yourself to only thinking in integer terms.For example, non-integer values in objective functions could be examined if an answer is wanted correct to the nearest cent.
I am guessing at what you might mean by swapping the x and y coefficients "at the start"?
If the objective function is, say, P=12x-3y, then the sliding line method is easier if you could rewrite this function in the form y=mx+c
So P=12x-3y would become y=4x-P/3
Then slide a line, with a gradient of 4, up as far as you can go, and still touch the feasible region, to maximise P or down as far as you can go to minimise P.

Well I looked online and the sliding method I learnt was that you get the coefficients of x and y in the objective function, so in this case 12 for the x and -3 for the y and you plot an x coordinate (-3,0) and y coordinate (0,12) and use a ruler to get a line between these two points, which gives the gradient of 4 that you got.
Do you know any links or have any info on what technique to use for finding the maximum of an objective function which doesn't at a corner point for some reason? Or is it always the corner point? Thankyou Plato!

[StupidProdigy]

Can you call a histogram a descriptive statistic? This question was actually on a psych exam and the solutions said it could be but it doesn't sound right..pls confirm

[Aaron]

Can you call a histogram a descriptive statistic? This question was actually on a psych exam and the solutions said it could be but it doesn't sound right..pls confirm

Yes it is - from a histogram you can identify how data is distributed (e.g. positively skewed, negatively skewed, bell shaped). From a uni statistics perspective, it is a descriptive statistic.