Russell and his family are thinking about getting a new big-screen television. He has researched different brands, models, and prices of televisions from the Internet. In this scenario, Russell is the .

purchaser

Explanation:

In business, purchaser are the people or organizations that make economic sacrifice in order to obtain a specific goods and serviced.

From the example above,

In order to obtain the new big-screen television, Russell will most likely need to spend the money that he earned from his work and exchange that money to for the TV.  This is what considered as economic sacrifice.

the above statement/question is (true);

the factors that the economies of the muslim empires prosper were:

1- land trade routes-located between three continents  

2- sea trade routes

trade contributed to the spread of muslim empires, and with that islamic culture led to a growing feeling of internationalism resulted in the transfer of technology, science, and other cultural forms.