# How do you write .0000000009  in scientific notation?

Apr 17, 2016

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

#### Explanation:

You must move the point to the right counting how many positions you moved up to passing the first non-zero digit ($9$):
Here you move the point of $10$ positions.
You then have:
$9 \times {10}^{-} 10$
Where the right movement is represented by the minus sign and the number of positions by the numerical coefficient of $10$.