## Scientific Notation

**Scientific notation** is used to express very large (e.g. 297,000,000,000) and very small (e.g. 0.00000039) numbers in a more concise form. Number expressed using scientific notation are written in the form:

a x 10^{n}

For example the number 297,000,000,000 can be written as:

2.97 x 10and the number 0.00000039 can be written as:^{11}

3.9 x 10^{-7}