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This is a minimisation problem, but it's slightly tricky to see what it is we're minimising. Seeing as it's a that's varying, we are going to have to differentiate with respect to a at some point. We're g...

Kekulé's model of benzene is that it has 3 double bonds, in a ring of 6 carbons.
One - Benzene isn't very reactive, so if Kekulé's model were to be correct, there would be 3 double bonds in benzene, ...

Firstly, the structure of each point you make should follow the Point, Evidence, Explanation format (PEE). If you structure each new point/paragraph in this way you can achieve the highest level. Secondly...

Fringing, barrier and atoll reefs described, with a description of how a fringing reef is close to the coast in shallow water zones, barrier reefs develop through subsidence with a separation between the ...

First make left =0x²+y²-6x+4y+4=0Second put same terms together(x²-6x)+(y²+4y)+4=0Complete the Square (do a square (X+b)² that gives you you x^{2 ...}