Respuesta :

Step-by-step explanation:

2.3×10⁵< 8.5×10⁵< 5.5×10⁷< 3.6×10⁸< 8.1×10⁸< 7.2×10⁹.

hope this helps you.

The 5th
The 3rd
The 1st
The 6th
The 2nd
The 4th