What are the physical regions of Africa

Witch layer of the atmosphere has the most air pressure

Nrectangle pqrs, pq = 18, ps = 14, and pr = 22.8. diagonals pr¯¯¯¯¯ and qs¯¯¯¯¯ intersect at point t. what is the length of tq¯¯¯¯¯? a.7b.9c.11.4d.22.8

Trade routes emerged along which coast when arab and indian traders from around the indian ocean mixed with the bantu people from africa's interior? a. swahili coast b. guinea coast c. drakensberg coast d. namib coast