Denmark has the greatest population density and Egypt has the least population density.
Population Density:
Population Density is the number of population per unit of total land area of a country. It is calculated as:
[tex]D_{p} =\frac{N}{A}[/tex]
Where, [tex]D_{p}[/tex] is population density
N is the total population
And, A is the land area covered by the population
According to the question
Population Density Of U.S=[tex]\frac{272648000}{9364520}[/tex]=29.11 persons per square km
Population Density Of Denmark=[tex]\frac{5248000}{42077}[/tex]=124.7 persons per square km
Population Density of Egypt= [tex]\frac{5784000}{1759540}[/tex]= 3.3 persons per square km
Hence, Denmark has the greatest population density and Egypt has the least population density.
Learn more about the population density here: https://brainly.com/question/23074425