Standard Form by Boxed Rockets

Convert these numbers between standard form and normal numbers

6.72 \times 10^{3}

6720

7.73 \times 10^{4}

77300

8.5 \times 10^{- 3}

0.0085

90100

9.01 \times 10^{4}

2550000

2.55 \times 10^{6}

0.000617

6.17 \times 10^{- 4}