Standard Form by Boxed Rockets

Are These Numbers in Standard Form?

3.6 \times 10^{-6}

Yes

2.53 \times 10^{4}

Yes

2.05 \times 10^{4}

Yes

4.75 \times 10^{3}

Yes

7.49 \times 10^{3}

Yes

7.82 \times 10^{-6}

Yes