ANSWER:
a. 1950 people per square mile
b. The island's area got smaller
c.
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:
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: