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Generally speaking, the imperfect describes:

1. Ongoing events which haven't been completed yet E.g. J’étais à l’école – I was at school.

2. Repeated actions – non-specific n...

Pythagoras' theorem is: a^2+b^2=c^2 (a=short side, b=short side, c=longest side/hypotenuse, ^=squared). Now applying that to this question would mean that a=PQ, b=PR and c=QR. So we can use the figures gi...

Unemployment is the number of people that do not have a job, but have been actively searching for a job for at least 4 weeks. The unemployment rate can be calculated by dividing the number of people unemp...

The subjuntive is a special form of the verb used in certain cases. It is often used as to express a mood, and serves to enhance the speaker's reaction to what is being said. The subjunctive could be used...

The Cognitive Interview technique (Fisher and Geiselman, 1992) is an interview method devised to enhance the retrieval of information from a witnesses memory. It consists of a series of memory-enhancing t...