# How do you write 129.5 million in scientific notation?

##### 1 Answer
Mar 29, 2018

$1.295 \times {10}^{8}$

#### Explanation:

Written out it looks like:
$129 , 500 , 000$

We're going to move the decimal place to the left to remove all of the zeroes. Right now the decimal place is here:
$129 , 500 , 000 \textcolor{red}{.}$

We're going to move it all the way to here and remove the zeroes:
$1 \textcolor{red}{\text{."29,500,000 rarr 1color(red)".}} 295$

Okay, so put your finger where the decimal is at in the first spot and move it all the way to the second spot, counting as you go. You should have moved $\text{8 places}$. So we're going to use the power of 10 with a 8 as the exponent:

$1.295 \times {10}^{8}$

Here is a helpful image on scientific notation:

And here is a helpful article .