# How do you write 7.2times10^5 in standard form?

Aug 3, 2016

720 000

#### Explanation:

$7.2 \times {10}^{5} \text{ is already expressed in "color(blue)"standard form}$

I believe you mean express as $\textcolor{b l u e}{\text{original number}}$

To do this consider ${10}^{5} \text{ or more generally} {10}^{n}$ where n is an integer.

• If n > 0 $\textcolor{red}{\text{move decimal point n places to the right}}$

• If n < 0 $\textcolor{b l u e}{\text{move decimal point n places to the left}}$

here n = 5 > 0, hence move decimal point 5 places to the right.

rArr7color(red)(•)2to720000color(red)(•)

$\Rightarrow 7.2 \times {10}^{5} = 720 000$