# How do you evaluate #(2.05times10^-8)/(4times10^-2)#?

##### 1 Answer

Apr 20, 2017

#### Answer:

#### Explanation:

Do not be tempted to change the numbers into decimal notation - that defeats the purpose of using scientific notation in the first place.

Consider

This could be written as:

Simplifying leads to:

In the same way

can be written as

Write in correct scientific notation - move the decimal place one place to the right the index will decrease.