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Why Use h and k for the Center of a Circle? [05/09/2000]
Why are k and h used in the equation (x-h)^2 + (y-k)^2 = 0 for a circle with center (h,k)? Why not j and f, etc.?

Writing Checks [07/31/2002]
When writing a check, how do you indicate the number of cents in the part where you write out the amount using words?

Writing Sigma Notation [02/03/1999]
What does the equation that goes under the Sigma notation imply?

Years That Start on Sunday [10/02/2000]
What is the probability that a randomly chosen year will start on a Sunday?

Zero Before the Decimal Point? [10/06/2000]
What is the merit of writing the zero before the decimal point in numbers less than one, for example 0.25?

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