The correct answer is: "He developed mathematical principles"
René Descartes (1596 – 1650) was a French philosopher, mathematician, and scientist who lived more than 20 years in the Dutch Republic and was one of the main figures of the Dutch Golden Age.
His great influence in mathematics has been his major contribution to the Scientific Revolution, although his work in philosophy is outstanding too. He developed the the Cartesian system of coordinates. He is considered the father of analytical geometry, which connects both algebra and geometry and which has been used in the development of infinitesimal analysis and calculus .
Answer:
the United States of America ensured that take up to down the spread of communism in the world. this was achieved by ensuring that any devastated country was helped in it's economic strains.
Explanation:
the spread of communism was kept in countries like Korea Berlin and Cuba.
The following ways were used.
1.The Berlin Airlift.
due to the blocked ways by the Soviet the United States and shared that they airlifted foods to the devastated countries.
2.Creation of NATO.
net was greeted by several countries including Canada United States and other European countries to ensure that they provide security to all those Nations again as Soviet Union.
3.The Use of Marshal plan.
notifying other European nations when taking possession of African territories
and
actively occupying the territory, as shown by a flag and keeping a police force
