Answer:
A type of democracy in which people elect their representatives directly.
Ancient Athenians used this type of democracy to elect their leaders when they gather at an assembly.
Answer:
The length of the third side is 2.
Explanation:
According to figure, we have a right triangle. The missing length can be determined by Pythagorean Theorem:
(1)
Where:
- Hypotenuse.
, 
- Legs.
If we know that 
and 
, then the missing length is:
(2)
The length of the third side is 2.
Answer:
For the process of gold mining , Na₂CO₃ is better than Fe₂O₃
Explanation:
<u>The task of a gold miner , is to extract gold .</u>
For the process of Gold mining , carbon filters are preferred , because by using carbon filters gold can be easily extracted .
In general , silver and gold get adsorbed on the surface of carbon , hence can be very conveniently extracted from the solution .
