Recent content by CopperPike

Hopefully… we will have to wait and see.Yeah the 2020 was quite a breeze. 2013 wasn’t that bad at all, and 75 was scaled to a band 6. I reckon the cutoff will probs be 73 (maybe) but more close to 74-75 imo

Raw mean mark for last year's exam was 38.1/50 and scaled was 28.4/50. I wonder how our cohort's stats will look like .

Ah yes makes sense when I look at the eqn lol. That's a sneaky one I guess

I don't know if this was mentioned previously...but as the question asks for height above ground level, shouldn't the answer be 445m (so 345+100 above ground level)?

I see now, thanks for the help!

10) a. -calculate the number of moles of butane [n=m/MM, n=65/(1.008*10) +(12.01*4) ---- n=65/58.12 = 1.118...]- you are dividing the mass of butane by its molar mass 58.12. -then calculate the number of moles of oxygen- as it is at SLC, then as 1 mol=24.8L, that means that 200L=8.06...mol...

Do you have the answer to it?

Yeah that’s it, I see it now. Thanks for the help!

Hey guys, could someone explain question c, the image is attached: This is its solution: I got up to the 2nd last line, don't know how to get the last line though. Thanks for any help!

191.45 cm

That makes a lot more sense. Thanks for the help!

I'm confused. Is this an AP or GP. I took it as an AP, where it take 14 years for profit to increase over 100% because profit increases by 14%. when you say 'it would be 2 times', what percentage are you referring to, because it looks like 50% if this question is a AP.

Hey guys, i've been stuck on this question for a while. Its from Cambridge: This is the answer. But why is the profit 21x larger? Thanks in advance to anyone that helps

Hey guys, could someone please explain how to get the answer to this question in maths in focus: This question was asked back in 2013 in a thread and the answer was said to be $240 652.62 , but the new textbook says that the answer is $466 563.74. I have attached my working out so it would be...