How to write 0.000054 in scientific notation?

5.4 * 10 - 5

Explanation: You move the decimal in front of the first real number smaller than 10. In this case it's 5.

From there, you multiply it by 10. The number of places that it took you to move the decimal to make the number a whole you will make it the power in this case it's also 5. But it's negative five because it's a decimal.