# How do you write 0.000057 in scientific notation?

You need to get to the form $a \times {10}^{b}$ where $a$ is a number with just one non-zero digit in front of the decimal point.
In order to do this, you will have to shift the decimal point 5 places to the right, in other words you have to divide by 100000 (1 with 5 zeroes). A 1 with 5 zeroes is written ${10}^{5}$.
$= \frac{5.7}{10} ^ 5 = 5.7 \times {10}^{- 5}$