# How do you write 0.03054  in scientific notation?

$3.054 \setminus \times {10}^{- 2}$
Writing numbers in scientific notation means moving the decimal point left or right so that the number is between $1$ and $10$.
In the number $0.03054$, you need to move the decimal point two places to the right to get to $3.054$ (which is between 1 and 10).
Since you moved the decimal point two places to the right, you must indicate it by saying that you multiplied $3.054$ by ${10}^{- 2}$. Think about it: $3.054 \setminus \times {10}^{- 2} = 0.03054$. In other words, you are kind of writing equivalence statements.