12. The value of the first 5 is only 50 people. The second 5 is worth 50,000. So if 50 was ten times greater it would still be less because that only equals 500. So No it isn't.
13. 1 × [tex]10^7[/tex] + 8 × [tex]10^6[/tex] + 8 × [tex]10^5[/tex] + 0 × [tex]10^4[/tex] + 1 × [tex]10^3[/tex] + 3 × [tex]10^2[/tex] + 1 × [tex]10^1[/tex] + 0 × [tex]10^0[/tex]
