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We should put the names aside to begin with and just look at the ratio and the price. In order to find out how much the ratio 3, the ratio 4 and the ratio 8 are worth, we need to find out how much the ...

Crude oil is a mixture of hydrocarbons. The crude oil is evaporatedand its vapours condense at different temperatures in the fractionating column. 

As you go up the fractionating column, ...

Introductions are your essay 'in a nutshell'. You want to briefly answer the question without going into too much detail. You should set up the structrue of your essay in the introduction, mention your...

The question gives you a hint on how to go about this question - Factorise!!

1) Factorise the left hand side. Find the two numbers which will add to give -8 and multiply ...

By exploring the following areas of the source, you can follow a general structure that can be applied to all source analysis. The depth of analysis depends on how much there is to say about a source, ...