GCSE Maths Practice: standard-form

\( \begin{array}{l}\text{Convert } 0.00045 \text{ to standard form.}\end{array} \)

Choose one option:

\( 45 \times 10^{-5} \) \( 4.5 \times 10^{-4} \) \( 4.5 \times 10^{-5} \)