VCE General & Further Maths Question Thread!

[littledreamer]

Thanks Aaron!

Can anyone solve this question too: The pH scale measures acidity using a log (base 10) scale. For each decrease in pH of 1, the acidity of a substance increases by a factor of 10. If a liquid’s pH value decreases by 0.7, by how much has the acidity of the liquid increased? I somewhat understand using log base 10 but not when it comes to pH, is this also a big part of core? Thanks again

[Shadowxo]

Thanks Aaron!

Can anyone solve this question too: The pH scale measures acidity using a log (base 10) scale. For each decrease in pH of 1, the acidity of a substance increases by a factor of 10. If a liquid’s pH value decreases by 0.7, by how much has the acidity of the liquid increased? I somewhat understand using log base 10 but not when it comes to pH, is this also a big part of core? Thanks again

Hi, I didn't actually do further but I've done chemistry
Can't answer about the course but here's the pH solution
It increases by 10^^{decrease in pH} = 10^0.7 = 5.012

pH = -log₁₀(acidity)
10^-pH = acidity
pH decreases by 0.7. let pH represent the initial pH
new acidity = 10^{-(pH - 0.7)} = 10^-pH*10^0.7 = 10^-pH*5.012
The new acidity is 5.012x more than the original acidity
Hope this helps a little

[Aaron]

In addition to the above answer:

For the second part of your question, "is this also a big part of core":

- These types of problem based questions are common. It challenges you to think for yourself and apply what you've learnt. They are really valuable to understand, especially for the exams.

- In terms of a specific question regarding acidity and pH levels, I doubt you will need to know this *specifically*... but it's just one application question of many.

- The two main areas of the Core section are statistics/data analysis and finance/recursion. The topics within these two areas comprise the core section.

[NAT0003]

What is the trickiest part of further

[AngelWings]

What is the trickiest part of further

This is going to vary for everyone. In Further 3/4, it's broken down into various modules and each school/ individual take different modules to their own liking, as long as they complete two + the core modules (recursion and finance modelling & data and statistics). Some don't like Core, others don't like the modules their school does.

[Joseph41]

Hey, 2017 VCEers! If you want to ask a VCE Further question, you've come to the right place!

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Once you've done that, you can simply hit "reply", as shown in the image below.



Ask away, and all the best with Further this year!

[Finlayh]

Hi, I got 93% on my first further maths SAC. Has that ruined my chance of getting a study score of 50?

[Hena_omarzaii]

Hi, what types of percentages in ur sacs do u need for further to get 40+   

[Joseph41]

Hi, I got 93% on my first further maths SAC. Has that ruined my chance of getting a study score of 50?

Hey Finlayh! Welcome to the forums.

To answer your question bluntly, no, not at all. Achieving a study score of 50 does not require 100% in every SAC. And like, one might argue that's even more the case for Further, where ~66% of the study score is based on the exams.

So no, your SAC result has definitely not ruined your chance of a 50.

Hi, what types of percentages in ur sacs do u need for further to get 40+   

Hey Hena_omarzaii, how's it going? Welcome to the forums!

This is actually a really difficult question to answer, because study scores don't really depend on your raw results (due to scaling and technical stuff like that). Because SACs change from school to school, it wouldn't really make sense to judge students based on what percentages they achieved; as such, I wouldn't want to give you a definitive answer on this.

[MattBro]

Good day,

Any of you got tips and tricks for Data Analysis. I find it to be a bs topic with some of the extended response answers to be annoying to answer.


Also on our first SAC on Data Analysis the teachers made it very challenging and I got 87.5%. Which surprised me because I thought I did poorly. If I get in the 90% on SAC's and smash out the exam will I possibly get 38 - 40 range?

Just the classic worried VCE student 

[MightyBeh]

Absolutely. Probably closer to the 38 end unless you completely dominate the exams. 

As for tips for data analysis; read everything really carefully. Not just the question, but the graphs and scales too. There's a lot that's easy to mess up with data analysis so make sure you're working with as many decimal places (if not exact values) as possible to avoid rounding mistakes. For filling in tables and things, make sure you're entering the right thing in the right place; back when I did further maths, I triple checked but that's probably excessive. Some people find that having 'copy-paste' responses for worded questions in their summary is helpful. If you use the TI calculator, there's a lot of good functions in there that teachers generally don't use/know about that can save you time. Just be careful, because sometimes they're not actually relevant or use different models to what's given in further maths. I'm not sure about the CASIO. It's faster to do a lot of things by hand but I recommend checking on the calculator anyway to make sure you haven't made any silly mistakes.

[NAT0003]

Does our school choose modules for 3/4 or can we choose them

[MightyBeh]

Your school chooses the modules that you will have SACs on. However if you really, really hate them, there's nothing stopping you from learning different ones for the exam and choosing them. On exam 1, you fill in bubbles indicating which modules you are doing - no one can stop you from doing the ones you'd like. For exam 2, it's marked by real people so they'll go through and see which sections you've completed. If you do more modules than the core + 2 that's prescribed, they'll pick which ones get included in your exam score, although I'm not sure how they pick. Probably in booklet order.

I wouldn't recommend learning new modules, but there's no rules against it.

[NAT0003]

For a 50 in further can you lose any marks across both exams

[zuleika]

Is there a quick and easy way to do seasonal adjustment on CAS (ti-nspire). I find it takes a lot of time solving by hand.