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Firstly, we want to start off by calculating how many litres of diesel the lorry uses when it drives for 200 miles. We know that with 1 litre of diesel, the lorry can drive for 35 miles. Knowing this, we ...

Finding the gradient or area underneath a graph

Simultaneous equations can be solved either using substitution or elimination.
For this example we will use substitution to work out the answer, which will involve rearranging one of the equations (...

To solve this question we need to understand the process of implicit differentiation, which is a case of using the chain rule. If you remember the chain rule states that for y=f(g(x)), we have y'=f'(g(x))...

Its called Euler's number but it can be said to be credited also to Bernoulli.
Hopefully you are aware of interest on loans from banks, if not, proceed to have a look on Wiki. In short, when you borr...