Using the concept of population density, it is found that Romania has the greatest and the U.S has the lowest population density.
<h3>What is population density?</h3>
It is given by the <u>number of habitants divided by the area</u>.
Considering the data given in the table, the density for the U.S. is given by:
dU = 272,648,000/ 9,364,520 = 22.115 hab/km².
For Romania, it is given by:
dR = 22,609,000/237,391 = 95.24 hab/km².
For Ghana, it is given by:
dG = 18,339,000/237,533 = 77.21 ham/km².
Hence, Romania has the greatest and the U.S has the lowest population density.
More can be learned about population density at brainly.com/question/26148357
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