Which president designed his own lap desk?

Thomas Jefferson

Explanation:

In 1776 Thomas Jefferson wrote the Declaration of Independence on this portable lap desk of his own design. Featuring a hinged writing board and a locking drawer for papers, pens, and inkwell, the desk was Jefferson's companion as a revolutionary patriot, American diplomat, and president of the United States.

Answer & Explanation: 1776 Thomas Jefferson wrote the Declaration of Independence on this portable lap desk of his own design. Featuring a hinged writing board and a locking drawer for papers, pens, and inkwell, the desk was Jefferson's companion as a revolutionary patriot, American diplomat, and president of the United States

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.