Question

I need help on this problem!!

Answer 1

$3.98*10^{6}(people)*\frac{1 mi^{2}}{1000 people} = 3.98*10^{6}* \frac{1 mi^{2}}{10^{3}} = 3.98*10^{6-3} mi^{2}= =3.98*10^{3} mi^{2}$