8.19 In 1980, the population of the United States was $226,504,825$, its area was $3,615,122$ square miles, and each square mile is (5280) ${ }^{2}$ square feet. Which of the following numbers is the best approximation of the average square footage per person?
(A) $5,0 \div 0$;
(B) 10,003 ;
(C) 50,000 ;
(D) 100,000 ; (E) 500,000 .
8
$\mathrm{E}$
8. With about 230 million people in an area of 4 million square miles, there are approximately 60 people per square mile. Since 1 square mile is roughly $(5000 \text{ ft })^{2}=25$ million square feet, this results in each person having about 25 million square feet divided by 60, which is closest to $(E)$.