A. Muslim mathematicians introduced algebra into the world
B. Ibn Sina collected medical knowledge into a book that was used for centuries in Europe
<h2>Explanation:</h2>
Algebra was first developed by the ancient Babylonians and remained dominant up to the 16th century. Muhammad ibn Musa al-Khwarizmi who was a 9th-century Muslim mathematician and astronomer is known as the "father of algebra". The word "Father of Algebra" was derived from the title of his book, Kitab al-Jabr.
Ibn e Sina is commonly known as Avicenna in european countries is considered as one of the most famous and influential scientists in the history of medicine. Ibn-Sina wrote a complete section about kidney calculi in his book. He wrote a lot of books but the best known book of his work is The Canon of Medicine which is his most celebrated book in medicine. This book provides a summary of all the medical knowledge of his time.
A - He wants to strengthen patriotic ideals by reminding his audience of the sacrifices of their forefathers.
Explanation:
Lincoln starts the Gettysburg address by reminding them of what their forefathers did 'four score and seven years ago' - 47 years ago in hopes of stregthening the thought of the Union through their sacrifices so they would not be in vain.
