The ability to round a number to a number of decimal places or to a number of significant figures is essential if answers are to be written to the correct degree of accuracy asked for in a question.

Somewhere around middle school, you learned about squaring numbers and the inverse, finding the square root of a number, but a little reminder can't hurt. You square a number when you multiply it by ...

Let us look at some interesting facts about squares and square roots. A square and its square root are the reverse of each other. But what happens to squares and square roots of negative numbers? When ...