Which of the following are accurate statements related to slavery in the United States. Check all that apply:

Once a slave earned enough money, he was able to buy his freedom.

Slave codes were enforced beliefs that slaves were property and they could not own propery or testify in court.

The first Africans were indentured servants who were freed after a term of labor.

The slave trade was known as the Bermuda Triangle.

The thirteenth Amendment abolished slavery.

All are correct except the “The first Africans were indentured servants who were freed after a term of labor.”

the answer is a, salt plain

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 % " .