so if 8 of the 36 trout were tagged, then 8/36 of the total trout in the dam should be tagged. Therefore 20 is equal to 8/36 of the total number of trout. dividing 20 by 8/36 gives you 90, so b.
5 periods a fortnight before school
we were planning on doing it during 2u but the assistant principal screwed up and made our teacher teach general every time we have 2u :(
I'm still doing complex numbers
just started complex polynomials stuff today
teacher doesn't really explain, just copies out of his book
not sure what book it is he just photocopies it and gives it to us
I think it's Fitzpatrick it's got new senior maths: four unit course at the top
3.a.
0.187 is positive so θ is in the first and 4th quadrant
θ = 79.22, -79.22
b.
sinθ = -3/4
-3/4 is negative so θ is in the 3rd and 4th quadrant
θ = -48.59, -131.41
cross multiply is where u get the bottom of each fraction and move it over to the top of the other fraction. if u still dont get it
multiply both sides by (p -j)
Q(p-j)/p =s
(Qp - Qj)/p = s
multiply both sides by p
Qp - Qj = sp
and u end up with wat i got before
the horizonatal length is x and the vertical length is y. to get y rearrange the eqn to get y = -3x/2 + 3
so the area is x(-3x/2 + 3)
A = -3(x^2)/2 + 3x)
dA/dx = -3x + 3
stat pts at dA/dx = 0
-3x - 3 = 0
x = 1
d2A/dx2 = -3 --> max pt
A = -3/2 + 3
=1.5