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.

A buddy of mine had an interview and was asked some horrible interview question. He asked me about it afterward, but I wasn't any help. This has been bugging me all ...

One of the oldest calculus problems, finding the area of a circle, can be visualized using a pizza. By dividing it up into ever smaller slices and laying them out next to one another, eventually you ...