How did Andrew Carnegie influence U. S. business, and in turn, the U. S. economy?

His textile mills made the United States a leading manufacturer of cloth.
• His factories and mills caused a huge expansion of slave labor in the United States.
His steelworks helped the United States become the world's leading industrial power
His automobile manufacturing plants helped make cars affordable to the average
American

first paragraph (and busy all the night ,with a silence deep and white )

the roman empire began to fall

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 % " .