Answer:
123 years to reach 2 billion
Explanation:
it is estimated that the population of the world one billion for the first time in 1804. it would be another 123 years to reach two billion in 1927. but it took only 33 years to rise by another billion people, 3 million in 1960.
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Answer: The optimum tariff.
Explanation:
The optimum tariff maximizes the liquid benefit resulted by the improve of the nation’s terms of trade, althought the volume reduction of trades.
In one side, the terms of trade of the country who imposes the tariff improve. On the other side, those of the trade partner decrease.
It should be noted that even that the terms of trade of the country that impose the tariff improved, those are smaller if compared to the losses of the trade partner
Our best estimate for the age of the universe is based on what we currently know about the universe's history is 13.772 billion years.
<h3>How to calculate the age of the universe?</h3>
There are two methods by which the scientists calculate the age of the universe:
By searching for the oldest stars
By calculating the rate of expansion of the universe and generalizing back to the Big Bang Theory.
Thus, Our best estimate for the age of the universe is 13.772 billion years.
Learn more about the age of the universe
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Answer:
The largest vegetation zone in Africa is tropical grassland, known as savanna. There are two forms of savanna. One is natural grassland
