Which renaissance artist also filled notebooks with plans for flying machines and armored cars, observations of plants and animals, and anatomical drawings of the human body?
a. cosimo de' medici
b. masaicco
c. lorenzo gheberiti
d. leonardo da vinci

bro where is your chart

that would be the steamboat because none of the other things are forms of transportation

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 % " .