Answer:
The population of the two most populous cities in the United state combined is [tex]11.9\times 10^6[/tex].
Step-by-step explanation:
Given that, in 2012 the population in New York city is [tex]8.1 \times 10^6[/tex]. In the same year the population in Los Angeles, California is [tex]3.8\times 10^6[/tex].
The population of two most populous cities is
=population in New York city + population in Los Angeles, California
=[tex]8.1\times 10^6+3.8\times 10^6[/tex]
[tex]=(8.1+3.8)\times 10^6[/tex]
[tex]=11.9\times 10^6[/tex]
The population of the two most populous cities in the United state combined is [tex]11.9\times 10^6[/tex].