Answer:a general vote by the electorate on a single political question which has been referred to them for a direct decision.
Explanation:
Foreign Investments.
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Answer:
B. Piri Reis
Explanation:
The Piri Reis map is a world map compiled in 1513 by the Ottoman admiral and cartographer Piri Reis (Turkish: [piːˈɾiː ɾeis]). Approximately one third of the map survives; it shows the western coasts of Europe and North Africa and the coast of Brazil with reasonable accuracy.
Answer:

Explanation:

Rewriting 400 as 20².

Cancelling the square root and the power.

The answer is b. the gravitational pull on materials of varying densities.