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The Common App is a valuable application tool but there's a lot to it – find out how to use it, key deadlines, essay prompts and more in our guide.

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Variance is a measurement of the spread between numbers in a data set. Investors use the variance equation to evaluate a portfolio’s asset allocation.

A mortgage is a loan used to purchase or maintain real estate, including houses and commercial properties. A buyer repays the loan in monthly installments.