What was mongol empire notorious for

Which form of government have the african nations had since independence?

Who introduced arabic numerals to italy, which make bookkeeping possible? a. brunelleschi b. cosimo de medici c. fibonacci d. gregory xi e. giovanni de bicci de medici

What do most climatologists see as a major cause of rising global temperatures? a. earth's closer proximity to the sun due to its gravitational pull b. greenhouse gases produced by burning fossil fuels c. rising ocean levels caused by melting polar ice sheets d. water pollution cause by industrial waste