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Africa

Back to Africa: 0 to A.D. 100

Northeast africa

The kingdoms of Meroe and Axum continued to develop. (See page 292) Egypt was under the rule of the Roman emperor, but beyond the mouth of the Nile, the country was actually little touched by Romanization. The royal custom of brother-sister marriage had been copied by the lower classes, and it has been estimated that by this century two-thirds of the citizens of Arsinoe were off spring of sibling unions. Alexandria was now a great trade center containing some 500,000 people, receiving goods from Red Sea ports and exporting its own manufactured products such as linen, processed Arabian drugs, Indian perfumes, papyrus, glass-ware and Egyptian grain. This city which originally was one of the greatest of the Greek cities, gradually became more and more oriental. Strife between Greeks and Jews resulted in massacres; soldiers mutinied and taxes soared.

Ptolemy, or Claudius Ptolemaeus

Not to be confused with the pharoahs of the B.C. centuries
, was a great scientist concerned with the Alexandrian library in this century. Inspired by Hipparchus, who appeared to have provided one of the links between Babylonian and Greek science, Ptolemy wrote a mathematical treatise which became known as the Almagest. The 360 degree circle of the Babylonians was used, trigonometry was promoted and astronomy advanced, although with some errors. With 1,002 stars catalogued the heaven was considered spherical and as rotating around the immobile earth sphere. This concept made Ptolemy's theories very acceptable to the theologians of the later Middle Ages. He did have a system showing relationships of stars and planets which was effective from the practical standpoint. He also wrote a Geographical Treatise which included the geography of Marinus of Tyre. (Ref. 48 )

North central and northwest africa

North Africa remained the granary of Rome, with the Moors as the dominant people of the area now developing considerable sea-power and prestige. The Moors were of Berber origin (later with an Arab mixture) and came originally from south of Morocco in the country of present Mauretania, on the great Atlantic bulge of Africa. In about A.D. 125 a locust invasion destroyed large areas of cropland and this was followed by a plague which killed perhaps 500,000 in Numidia and possibly 150,000 more on the coast. (Ref. 222 )

Subsaharan africa

The changes in central, eastern and southern Africa were very slow. As noted in the last chapter, the introduction of wet zone crops like the yam and banana allowed better penetration of the Bantu-speaking blacks into the forest and low-lying river valleys and coastal plains. They also continued to drift south along the Indian Ocean coast. (Ref. 68 )

Forward to Africa: A.D. 201 to 300

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Questions & Answers

An investment account was opened with an initial deposit of $9,600 and earns 7.4% interest, compounded continuously. How much will the account be worth after 15 years?
Kala Reply
lim x to infinity e^1-e^-1/log(1+x)
given eccentricity and a point find the equiation
Moses Reply
12, 17, 22.... 25th term
Alexandra Reply
12, 17, 22.... 25th term
Akash
College algebra is really hard?
Shirleen Reply
Absolutely, for me. My problems with math started in First grade...involving a nun Sister Anastasia, bad vision, talking & getting expelled from Catholic school. When it comes to math I just can't focus and all I can hear is our family silverware banging and clanging on the pink Formica table.
Carole
find the 15th term of the geometric sequince whose first is 18 and last term of 387
Jerwin Reply
I know this work
salma
The given of f(x=x-2. then what is the value of this f(3) 5f(x+1)
virgelyn Reply
hmm well what is the answer
Abhi
how do they get the third part x = (32)5/4
kinnecy Reply
can someone help me with some logarithmic and exponential equations.
Jeffrey Reply
sure. what is your question?
ninjadapaul
20/(×-6^2)
Salomon
okay, so you have 6 raised to the power of 2. what is that part of your answer
ninjadapaul
I don't understand what the A with approx sign and the boxed x mean
ninjadapaul
it think it's written 20/(X-6)^2 so it's 20 divided by X-6 squared
Salomon
I'm not sure why it wrote it the other way
Salomon
I got X =-6
Salomon
ok. so take the square root of both sides, now you have plus or minus the square root of 20= x-6
ninjadapaul
oops. ignore that.
ninjadapaul
so you not have an equal sign anywhere in the original equation?
ninjadapaul
hmm
Abhi
is it a question of log
Abhi
🤔.
Abhi
I rally confuse this number And equations too I need exactly help
salma
But this is not salma it's Faiza live in lousvile Ky I garbage this so I am going collage with JCTC that the of the collage thank you my friends
salma
Commplementary angles
Idrissa Reply
hello
Sherica
im all ears I need to learn
Sherica
right! what he said ⤴⤴⤴
Tamia
hii
Uday
hi
salma
what is a good calculator for all algebra; would a Casio fx 260 work with all algebra equations? please name the cheapest, thanks.
Kevin Reply
a perfect square v²+2v+_
Dearan Reply
kkk nice
Abdirahman Reply
algebra 2 Inequalities:If equation 2 = 0 it is an open set?
Kim Reply
or infinite solutions?
Kim
The answer is neither. The function, 2 = 0 cannot exist. Hence, the function is undefined.
Al
y=10×
Embra Reply
Jeannette has $5 and $10 bills in her wallet. The number of fives is three more than six times the number of tens. Let t represent the number of tens. Write an expression for the number of fives.
August Reply
What is the expressiin for seven less than four times the number of nickels
Leonardo Reply
How do i figure this problem out.
how do you translate this in Algebraic Expressions
linda Reply
why surface tension is zero at critical temperature
Shanjida
I think if critical temperature denote high temperature then a liquid stats boils that time the water stats to evaporate so some moles of h2o to up and due to high temp the bonding break they have low density so it can be a reason
s.
Need to simplify the expresin. 3/7 (x+y)-1/7 (x-1)=
Crystal Reply
. After 3 months on a diet, Lisa had lost 12% of her original weight. She lost 21 pounds. What was Lisa's original weight?
Chris Reply
how did you get the value of 2000N.What calculations are needed to arrive at it
Smarajit Reply
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Source:  OpenStax, A comprehensive outline of world history (organized by region). OpenStax CNX. Nov 23, 2009 Download for free at http://cnx.org/content/col10597/1.2
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