After 100 years of exposure to European settlers, about what portion of Native Americans remained? about one-tenth

about one-sixth

about one-half

about one-fourth

I'm not sure I think it's B

About 1 tenth

Explanation:

Most were wiped out from disease. Remember how the cold spreads fast? Well what is it was just as fast, and Just as lethal as Ebola? The natives had no immune system defenses and were killed off rapidly and quickly.

this isnt

the correct answer is:   "   3.6 % " .

          →   the unemployment rate is:   " 3.6 % " .

explanation:

to calculate the "unemployment rate" :

the "unemployment rate"   =

  [# of people unemployed] /   [working age population]   * 100 %   ;

                =   [9 million] / [250 million]     *   100 % ;

    →     note:   the units of "million" cancel out;

                    since:   " {million} / {million} = 1 " ;

                =   (9 / 250)   * 100 %   ;

                = 0.036 * 100 % ;

                =   3.6 %

answer:   the unemployment rate is:   " 3.6 % " .