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When you see a complicated product, split it into the form u.v', where u and v' are algebraic expressions such as x^2. You can then use the formula: uv'=uv-integral(vu') which you would take between an...

Rural-urban migration - the movement of indivdiuals from rural to urban areas - is the product of a plethora of push and pull factors, as exhibited by Lee's push-pull theory. Migration from rural to urban...

Capital expenditure appraisal is the evaluation of investment opportunities. 

1. Payback method = The payback method involves calculating the payback per...

The equation is 2πr.  That is 2 x pi x the radius (not the diameter!)

There are two situations when you can use an apostrophe:  contractions and for possession.  I will start with contractions as this is the easiest.

A contraction is when you...