3) if a country has an area of 7,000,000 km squared and a population of 28 000 000, what is their population density?

4 per km sq

Explanation:

as the formula of population density is number of people/ land area

so population density = 28000000/7000000=4

tunami b/c it is near water

true. earthquakes are felt whenever there is a slip around a fault in the rocks below the earth. this reorientation of faults create sesmic waves and is known as earthquake, the severity of which is measured in richter scale. these are more prominent in hilly regions as the rocks usually form faults to balance the pressures on it.