i think the a+ib is seperate from the equation
u just multiply across, expand, collect and factorise the terms with z, divide by coeffient of z , then realise the denominator
unless it says "you may assume ...etc" then u have to derive it for tangents and normals
for chord of contact, u can state it unless it asks u to prove it
if the waterbomb did come from a car driving at 60k/hr, fair enough get expelled for either intent, or stupidity (if intent wasn't there).
i don't think OP's case came from a car though, most likely it didn't do any damage, in that case expulsion seems a bit much.
if your there for the knowledge, pick engineering, if u want marks, pick physics instead or chemistry instead.
the engineering course for the HSC is substantially more difficult than the sciences from the fact that it has almost double the content.
in terms of difficulty, engineering...
i'd say 97-98, u've got 4 units above avg and 7 below, 1 unit of maths probably won't about and i'll assume chem is strong at ur school if high 70's (almost band 6) == 85/105, subject scaling wise is good aswell
i see what ur saying, i'm just pointing out, more than likely the band distributions for schools with similar ranks will be similar, if hes lucky and english is an incredibly strong subject at his school then i'll probably be wrong but usually schools don't have 1 good subject and the rest...
easy internals won't make a difference, it all gets scaled in the end to match our external average, percentage of band 6's is related to school rank, in which OP's and mine are similar.
holy wtf? now i really believe that aims influences estimates.
90/120 for english? thats like high band 4 internal, i dunno why everyone is going on about band 6 for english, even if u get 100 it will average to band 5.
if u don't believe me, my school is ranked 70th, similar rank, out of...