Whay 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 baisis 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.

What explains the increase in life expectancy in botswana? a. the increased availability of jobs and an improved economy b. access to antiretroviral drugs, hiv/aids education, and widespread hiv/aids testing c. a series of military takeovers that stabilized the political system and led to education reform and increased literacy rates d. a recent military coup that led to an improved healthcare system select the best answer from the choices provided.

Moral principles is what ? a. appreciation b. tariff c. fiscal d. ethics

Which of the following is not true of the xiongnu empire? burial mounds included glass beads and mirrors made from the sands throughout the region. there was more cooperation through trade between the tribes. other tribal units that were eventually assimilated were indo aryan, xianbei, hunyu, scythina and han chinese. as each nomadic tribe and civilization was conquered or absorbed into the larger empire, the xiongnu were able to hold more territory.