In a recent year, the population of California was about 2.52 x 107 people. Its land area is about 4.05 x 105 km2. What was the average number of people per square kilometer?

Answer 1

2.52*10^7 ppl / 4.05*10^5 km^2 = 2.52/4.05 * 10^(7-5)
= 0.622 * 10^2
= 62.2 ppl/km^2