According to the Stanford-Binet formula for an intelligence quotient (IQ), the IQ of a ten-year-old child with a mental age of eight and a half years is 85 A 95 B 100 C 105 D 115

85  

Explanation:

To calculate IQ using the Stanford-Binet formula =

(mental age/chronological age) x 100

Hence, the IQ of the child = (8.5/10) x 100

                                           = 85.

imperial crisis leads to civil war.

roman forces withdraw from britain as goths attack rome.

odoacer topples romulus augustus

huns attack the empire and drive german peoples ahead of them.

muslims have taken his goods and products to different parts of asia an indonesia. sometimes just traveled and trade, but in other occasions, stayed in the place and made a living.

trade was the key for muslims economies to prosper. their commerce routes reached far places like malaysia and java in the 11th century.

another important factor for prosperity was that muslim states served as the middle point for european traders.

they used to travel by land but sailing the seas -the indian ocean- really increase the exportation of products.