Hindu-arabic numerals were developed around 400 b. c. and are used in a decimal (base 10) system. which of these is true about arabic numerals?

The answer is C. They were invented in India and brought to Europe by Arabs. I just took the test and got it right.

cause you are attracted to the features of girls or if you are a boy you are attracted to the features of a boy.

for many centuries there were important factors which the economies of the muslim empires developed increasingly. they applied economic procedures in production, investment, finance, taxation and property. they used to tax certain goods (for example: harvest), they charged interest on money lent, they signed contracts with merchants; they relied on a common currency, and they used checks as well as promissory notes. with the money collected by means of taxation, the government provided the needy with an income. in addition, trading networks covered huge distances, so far regions started to have contact and exchange goods. this trade network covered areas of asia, africa and europe.