The size and shape have no effect on density of matter because the size and shape of the particles stay the same no matter what.
Answer:
Explanation:
Between about 800 and 1200 AD, partly in response to the new currents of trade, Africans in the southern sahel developed a set of trading states with an elaborate organization.Well before 1500 AD, a number of states had come into existence, that had no connection at all with the trade across the Sahara.
plz mark as brainliest
I don't get it theres so much symbols
