3. Archimedes determines formulas for the area and volume of a sphere. 250 B.C.

4. Eratosthenes determines the circumferences of Earth.

5. Appollonius studies conic sections.

6. Al-Khowarizmi uses zero. 830 A.D.

7. Rudolff introduces the radical sign. 1525 A.D.

Some common words found in the essay are:
, Freed Flaw', Analytical Engine, Pascal Fermat, Principia Mathematica, Marc Dovico, II Books, Whitehead Russell, 1748 ad, invents calculus,
Approximate Word count = 277
Approximate Pages = 1 (250 words per page double spaced)