Question about Equilibrium Price To find the equilibrium price I understand you set $$ Q^s = Q^d $$ 
and then solve for p. But as P is not indpendently labeled in $$Q^d$$ I am slightly confused how you would go about writing this equation? Thanks!
So you want to find $\partial p / \partial k$

By implicit differentiation what they mean is let $p=p(k)$ so p is a function of k. 

Take your equilibrium condition $Q_s-Q_d=0$ and now differentiate with respect to k.