How did the silk road provide contact with the exotic?

need two example's

This chart shows american troop strength during what conflict? a) gulf war b) korean war c) vietnam war d) world war ii

Sanjay solved the equation below. which property did he use to determine that 7x+42=42 is equivalent to 7(x+6)=42 7x+42=42 7x=0 x=0

Who were some of the most important scientist in there and shipments of the revolution