how many times larger is 5.4 x 10 to the 6th power then 9 x 10 to the 3rd power

To find:
how many times larger is 5.4 x 10 to the 6th power then 9 x 10 to the 3rd power
Solution:
Let it is x times larger. So,
[tex]\begin{gathered} x\times(9\times10^3)=5.4\times10^6 \\ x=\frac{5.4\times10^6}{9\times10^3} \\ x=0.6\times10^3 \\ x=6\times10^2 \end{gathered}[/tex]Thus, two options a and c are correct.