Ebbinghaus found that he could remember percent of a list of nonsense syllables an hour after learning the list perfectly, percent a day later, and percent a week later.

44,35,21

Explanation:

It can be realized that information memorized tends to depreciate memory value in the human brain over a longer period of time. What a student reads or learnt in school will tend to loose memory value the longer he last came across what he studied unless they revise what they learnt or repeat what they read.

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.