Patrick wakes up one morning to find that he has developed an enormous pimple right on the end of his nose. all throughout the school day he is absolutely sure that everyone is staring at the blemish, when in reality almost nobody cares enough about it to even look. patrick's certainty that he is the focus of others' attention demonstrates

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.