Ramon has been asked to participate in a study on the quality of food in the dorm cafeteria. He will be in the study with 20 other students, and they will all be able to offer their opinions on the food. This is an example of a group.

the answer would be in this answer. someone already asked the question.  

i took very good i wish you luck! i hope it .

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.