Re: HSC 2016 2U Marathon
a^o=X => loga(X)=o
a^g= Y => loga(Y)=g
a^l=XY => loga(XY)=l
a^l = a^o * a^g (when multiplying by same base add exponents)
a^l = a^o+g (same base, exponents must equal each other)
l = o+g (substitute back into log form)
loga(XY) = loga(X)+loga(Y)
Im going to get...
If an object is speeding up, its acceleration is in the same direction as its motion. SO since v<0 and a<0 the particle is speeding up in the negative direction.
On the contrary, if v>0 and a>0 then the particle is speeding up in the positive direction
Re: HSC 2015 2U Marathon
hey dr wouldn't it be 20/52 * 4/51 * 3/50 * 2/49 *1/48 as once you pick the first card, there is only a possibility of 4/51 to pick the 2nd of that same suit then 3/50 to pick the 3rd of that same suit ect