the number
540,000
As we can see we can write this number in scientific notation
[tex]\begin{gathered} 540\times10^3 \\ 54\times10^4 \\ 5.4\times10^5 \\ .54\times10^6 \end{gathered}[/tex]the right answer with the option given is 5.4 x10^5
[tex]5.4x10^5[/tex]