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Both are fine, in the context of organic chemistry the first way makes sense, in the context of acid/base second way makes sense but overall both are perfectly fine. (atleast for HSC, CM_tutor might have some uni level explanation as to why one is better lol).

Is the answer D? (took me about 1 minute). Also no these tests mean next to nothing in intelligence and is really just a brain-teaser.

What does R1 and L1 mean?

Yep the HSC is normally distributed If I recall correctly.

One more thing to note is the atar comes in 0.05 increments so a 99.94 is not possible. You can check table A7 in the link above for every increment

From here https://www.uac.edu.au/assets/documents/scaling-reports/preliminary-report-2020-nsw-hsc.pdf 17% got 90 or above (in 2020), which is roughly 9000 people.

What happened?

2NH3=NH3+NH3 so A works. No such trick with B

In focus and pearson, in that order.

I would try finding pdf's (literally type the short story you want they pdf after), or look for websites with that short story. For your second point thats why short stories are so good since they get straight into the action, for example in the machine stops, from the first page you can pick...

I don't know if this is copyrighted but https://www.cs.ucdavis.edu/~koehl/Teaching/ECS188/PDF_files/Machine_stops.pdf

If you are looking for creative inspiration maybe short stories are the way to go, I recommend 'The machine stops' a geninuely helpful story (really creative) that helped me.

Not really quote some past advice

Not everyone needs to be a 1000 iq English genius to comment. She is just giving a book recommendation of a book I presume she likes, I don't see the big deal.

Not sure if this will help you for English but Harry Potter is really good, easy read fun etc.

Yeah lol, some factoring trick I imagine, or King Rule but I dont see how that is used.

His back

For some reason I thought it was clearer without latex lol

MB^2+EM^2=EB^2 MB^2=30^2-20^2 But MB=MC same idea In triangle MBC MB^2+MC^2=BC^2 2MB^2=BC^2 Square root both sides thats where the square root 2 comes from

Try selective school past papers you will definitely 'run into' hard questions there. They also usually have worked solutions like on thsc so check up on their methods.