Questions

Herodotus, a Greek author written the first history book in 5th century B.C.

The main difference lies in the motive of the two parties. The main motive of the hedger is to hedge(minimize) the risk from the occurence of some events. 

The motive of the speculator is to gamble in the market in order to make the profit by buying/selling the derivative products.

Sanjaya Baru

Joseph Priestley and Carl Wilhelm Scheele both independently discovered oxygen in the year 1774, but Priestly is usually given credit for the discovery.

450 mm Hg denotes the air pressure.

General education policy is set by multiple levels of the government like Federal, state and local governments.