Islam was introduced to west Africa by (c. traders)
The school of 18 century is called Grammar School.
Answer:
Radio-wave communications signals travel through the air in a straight line, reflect off of clouds or layers of the ionosphere, or are relayed by satellites in space. They are used in standard broadcast radio and television, shortwave radio, navigation and air-traffic control, cellular telephony, and even remote-controlled toys.
Explanation:
1790. It when on for many years and membership even rose in 1820