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.

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 ...

When working with circles it is important to know the following definitions: The radius (r) of a circle is the distance from the centre to the outside of the circle. The diameter (d) of the circle ...