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Here's what I'll say. Eddie woo, Eddie woo, Eddie woo + the plethora of online teachers and tutorials we have to our disposals. Yes, we have the pandemic. Yes, it will probably come for me next year in the HSC again. But; we need to use what we have as a generation. The internet is so powerful -...

jokes on you because maths advanced isn't a calculus course ur mum

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Yep. Or the proper z-score probabilities if given. The other commenter was confused on if we needed a calculator that has a function white allows you to find the probability of z-scores on a normal distribution with a button (fx-100); but u can do the same stuff with fx-82 as long as you know...

How does one do part a?

I am almost entirely sure yes, you are allowed. Some graphing questions have maximas, of like (3,27), etc; and these would be ridiculous to draw true-to-size especially with the size of working out they give you.

Nope. I've never thought I needed such a feature. I would recommend learning the formula; and how you can apply such a formula with your normal calculator.

Ah, indeed. I was just thinking about bi-variable stats. Sorry!

You've got enter in some ax+b data by going into mode -> stat; and then u will have a new option for the probability distribution variables (r, A, B, etc)