George sold:
[tex]\begin{gathered} 8\times10^5 \\ =800,000 \end{gathered}[/tex]and Veronica sold:
[tex]\begin{gathered} 4\times10^6 \\ =4,000,000 \end{gathered}[/tex]As expanding the scientific notation numbers, we see that
George sold eight hundred thousand
Veronica sold 4 million
How many time is 4 million of 8 hundred thousand?
We simply divide!
[tex]\frac{4,000,000}{800,000}=5[/tex]So,
Veronica's song was downloaded 5 times the numebr of that of George.
B is the right answer.