VCE General & Further Maths Question Thread!

[Kimahso]

I need help with crashing in NETWORKS, my teacher doesnt know it and i dont either.

Crashing is just reducing the duration of an activity. A question might be that that an activity is crashed by 2 hours and you have to find out what effect this has on the project completion time.

[masch]

I was wondering for the first question I attached, my teacher says you round to 19 but others say round to 18 payments as it is the 'nearest whole number', unlike 19. Please help!!!

The question is flawed. The request to round down to the nearest whole number does not effectively answer the original question.

[Legemeton]

quick question. On the VCE 2015 further written exam 2.
Can someone explain the question 3e on the networks module to me and how the answer is 33 minutes, 7 minutes increase?
I don't understand why you just won't just go to F and H again. and rather divert? It is because of the mention of least effect?

Cheers

[leetheastronaut]

hey, can someone please help me with this question? I've attached a picture underneath

question: Find the shortest distance along the surface of the bowl between C and D where CD is the diameter of the water surface, to the nearest whole centimetre.

[Kimahso]

quick question. On the VCE 2015 further written exam 2.
Can someone explain the question 3e on the networks module to me and how the answer is 33 minutes, 7 minutes increase?
I don't understand why you just won't just go to F and H again. and rather divert? It is because of the mention of least effect?

Cheers

Write down the ESTs for each activity on your new network (with the dummy activity) and you'll find out that the completion time increases from 26 to 33. I was actually confused about that question too until I did that.

[Legemeton]

Write down the ESTs for each activity on your new network (with the dummy activity) and you'll find out that the completion time increases from 26 to 33. I was actually confused about that question too until I did that.

Where would you place the dummy activity? my critical path remains to be 35

[EdwinJS]

Does anyone have suggested solutions for the 2016 VCAA Sample Exam 2 (Short Answer) for further?

[MightyBeh]

hey, can someone please help me with this question? I've attached a picture underneath

question: Find the shortest distance along the surface of the bowl between C and D where CD is the diameter of the water surface, to the nearest whole centimetre.

Not 100% sure I'm correct, so let me know if it's wrong.

[knightrider]

For questions where we have to find recurrence relations.

if they dont tell you what to round to do we just write the exact value down when stating the rule ?( as in exact R value in rule Vn+1=RVn)

Thanks 

[QueenSmarty]

Hey, can someone please help me with this question from VCAA 2014 Exam 2 (Q3b from the business module): The cricket club had invested $45 550 in an account for four years. After four years of compounding interest, the value of the investment was $60 000.
Interest on the account had been calculated and paid quarterly.
b. What was the annual rate of interest for this investment?

[Kimahso]

Where would you place the dummy activity? my critical path remains to be 35

Oops I thought you were talking about a different question. So basically you want to finish B and D first because it takes a total of 12 minutes as opposed to A and C which takes a total of 13 minutes. Right after that you can do D (because we know C and D can't occur at the same time), then F and H and I as in the normal critical path. So you end up adding 3+9+8+6+3+4 which = 33. It's a difficult question and kind of hard to explain, sorry if I confuse you.

Hey, can someone please help me with this question from VCAA 2014 Exam 2 (Q3b from the business module): The cricket club had invested $45 550 in an account for four years. After four years of compounding interest, the value of the investment was $60 000.
Interest on the account had been calculated and paid quarterly.
b. What was the annual rate of interest for this investment?

Enter N=16, PV=45550, Pmt=0, FV=-60000, Ppy=Cpy=4 and you'll get annual interest rate to be 6.948, round to 6.9%.

[Legemeton]

Oops I thought you were talking about a different question. So basically you want to finish B and D first because it takes a total of 12 minutes as opposed to A and C which takes a total of 13 minutes. Right after that you can do D (because we know C and D can't occur at the same time), then F and H and I as in the normal critical path. So you end up adding 3+9+8+6+3+4 which = 33. It's a difficult question and kind of hard to explain, sorry if I confuse you.

Enter N=16, PV=45550, Pmt=0, FV=-60000, Ppy=Cpy=4 and you'll get annual interest rate to be 6.948, round to 6.9%.

I understand it all but isn't it when finding the critical path you are looking for the longest path? then wouldn't you go A - C rather than B-D? when going B-D you would still have to do C. As it dose not specify with C or D must be done first

[QueenSmarty]

Oops I thought you were talking about a different question. So basically you want to finish B and D first because it takes a total of 12 minutes as opposed to A and C which takes a total of 13 minutes. Right after that you can do D (because we know C and D can't occur at the same time), then F and H and I as in the normal critical path. So you end up adding 3+9+8+6+3+4 which = 33. It's a difficult question and kind of hard to explain, sorry if I confuse you.

Enter N=16, PV=45550, Pmt=0, FV=-60000, Ppy=Cpy=4 and you'll get annual interest rate to be 6.948, round to 6.9%.

Ah, can't believe it was that easy. Thank you!

[Kimahso]

Ah, can't believe it was that easy. Thank you!

No worries.

I understand it all but isn't it when finding the critical path you are looking for the longest path? then wouldn't you go A - C rather than B-D? when going B-D you would still have to do C. As it dose not specify with C or D must be done first

A critical path is usually the longest path because you can't complete the project without completing the longer duration activities first. But this isn't a typical critical path problem.

"when going B-D you would still have to do C" - that's why you do C right after completing B and D? If you do that you'll realise that all activities are able to be completed in 33 minutes hence it's the critical path (in this circumstance where C and D can't be completed at the same time).

It doesn't specify if you go with C or D first because you have to figure out which one will have the least impact on the minimum completion time. If you go with C first as you suggest, then the path would be A-C-D-F-H-I which is 5+8+9+6+3+4=35. Which is obviously more than 33.

[ayesha2011t]

Can someone help me with this pls?