# How do you write 8.5 times 10^(-7) in standard form?

Jun 1, 2016

#### Explanation:

To express a number in standard form we write it as follows:

$a \times {10}^{n} \text{ where " 1≤a<10" and n is an integer}$

$8.5 \times {10}^{-} 7 \text{ is in this form}$

In case you are asking for the original number.

Then the $\textcolor{b l u e}{\text{ -7}}$ from the index of the 10 , lets us know to move the decimal point 7 places to the left from where it has been placed between the 8 and 5.

$\Rightarrow 8.5 \times {10}^{-} 7 = 0.00000085$