What contribution did al-khwarizmi make to the world of mathematics?

a.
he developed the formula and process used to make persian rugs.

b.
his work became the basis for algebra.

c.
he created the number system based on chinese number system.

d.
he determined the formula for finding the hypotenuse of a right triangle.

In critical thinking, what is the one resource that the human desire never surpasses the available amount? a)drinkable water b) air c) money d) oil

What ways did native americans influence the lives of european settlers in early america ?

Which source would best a historian understand the effect of the great chicago fire on families? a. a biography of a chicago family displaced by the fire b. a letter from a grandmother in new york to her family in chicago c. a newspaper editorial about families who were displaced d. an oral history dictated by an adolescent who fled the fire