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Hi guys, I have some (more!) questions; this time they're related to permutations and combinations. I have a very strong suspicion (read: almost certainty) that the given answers for these questions are incorrect, but I need confirmation from you guys... How many different arrangements can...

Hi guys, Q: David is in a life raft and Anna is in a cabin cruiser searching for him. They are in contact by mobile telephone. David tells Anna that he can see Mt Hope. From David’s position the mountain has a bearing of 109°, and the angle of elevation to the top of the mountain is 16°. Anna...

Hi guys, I have some questions from the Moving About module... Q1. I need help with understanding why the given answer to this question (see below) is correct. I just don't get it. Shouldn't the vector adjacent to theta (pointing up) be pointing the opposite direction, considering addition of...

I know this seems like a relatively simple enough question, but I cannot get the "right" answer, so please provide the answer, and don't just half-complete the question. I just want to know the answer so that I can confirm whether or not the answer the answer key gives is wrong. Thanks in...

Hi guys, I have a question regarding calculating angles, and though it's not really that important, I would really like to know it just for my knowledge... oh, and please explain in relatively simple terms!!! It says that "acute angles must be calculated relative to the x-axis, and never the...

Hi! I'm going into Yr 11 this year, and I think I need a tutor in English. I'm doing Advanced and Extension 1. My requirement for a tutor is: - Preferably a HSC marker/experienced English teacher I was wondering if you guys have any recommendations for such tutors... :) Thanks in advance! :D