Please Help I suck at math! 50 Points!
Use the chart below to answer the questions:

Country Population
(1997 estimate) Area
(square km)
U. S. 272,648,000 9,364,520
Romania 22,609,000 237,391
Ghana 18,339,000 237,533

Which of these countries has the greatest population density? Which has the least? Provide an explanation and proof for your answer to receive full credit.

Step-by-step explanation:

Step 1:  Find the density for all three countries

US -  

US -

US -

Romania -

Romania -

Romania -

Ghana -

Ghana -

Ghana -

Step 2:  Compare

The greatest population density is in Romania.  The reason why is because to find the population density, you need to divide the area of the country from the population.  That gives you the density and Romania has the greatest population density.

On the other hand, the least population density is in the United States.  This is done the same was as Romania but it turned out the be the least amount.  Therefore, the lest population density is in the United States.

Greatest: Romania

Least: the US

Step-by-step explanation:

Population density is calculated by taking the population and dividing that by the area of the region.

- US: population ÷ area = 272,648,000 ÷ 9,364,520 ≈ 29.1 people/km²

- Romania: population ÷ area = 22,609,000 ÷ 237,391 ≈ 95.2 people/km²

- Ghana: population ÷ area = 18,339,000 ÷ 237,533 ≈ 77.2 people/km²

Thus, since 95.2 is greater than the other numbers, Romania has the greatest population density. Since 29.1 is the smallest of the numbers, the US has the least population density.

the surface area is 124cm²

step-by-step explanation:

length: 4cm

width: 9cm

height:   2cm