ANSWER:
a. 1950 people per square mile
b. The island's area got smaller
c.
[tex]\frac{1950\text{ people}}{0.5\text{ square mile}}[/tex]
STEP-BY-STEP EXPLANATION:
Population density is the average number of people living per unit area. It is calculated by dividing the total number of population of a geographical unit (in this case it is the island) by the total amount of surface.
a.
Therefore:
[tex]Density=\frac{1950\text{ people}}{1\text{ square mile}}=1950\text{ people per square miles}[/tex]
b.
Since the size of the island is halved without losing any people, we can conclude that the area has become smaller.
Therefore:
The island's area got smaller
c.
Since it is half the area, the new density would be:
[tex]Density=\frac{1950\text{ people}}{0.5\text{ square mile}}[/tex]
