It is more difficult to climb a vertical staircase than a slanted one. give reason

Which of the following was a key accomplishment of the people of songhai? a. they had a strong military and became the largest empire in west africa. b. they established a center of islamic scholarship. c. they worked with iron and prospered from the gold-salt trade. d. they dominated in the trade of ivory, enslaved people, and animal skins.

Sailors went to special school to learn how to use the new technology that would them sail far distences. the school we know about was

Why would it be hard to live in a city state