How do you write the number 0.000000009 in scientific notation?

Jan 13, 2017

$9 \times {10}^{- 9}$

Explanation:

Given:

$0.000000009$

Count the number of places that the number needs to be shifted to the left in order to result in a number in the range $\left[1 , 10\right)$.

In our example, we need to shift it $9$ times.

Hence in scientific form we have:

$0.000000009 = 9 \times {10}^{- 9}$