How many known presidents has the us had not including the one that got re elected.

43

Explanation:

there are 45 presidents in total you said the one who didnt get re elected so obama and clinton so in total without those two its 43 presidents

answer; (73%);

the correct answer is the following is a list of inventions made in the medieval islamic world, especially during the "islamic golden age" (8th to 13th centuries),[1][2] as well as the late medieval period, especially in the emirate of granada and the ottoman empire.

science and technology in the islamic world adopted and preserved knowledge and technologies from contemporary and earlier civilizations, including persia, india, china, and greece-roman antiquity, while making a number of improvements and innovations.