The great plains, if we're talking about america here.
The kind of economy that was instituted under Joseph Stalin is a command economy<span>. A command economy is a type of economy where the government, rather than free market, determines what goods should be produced, how much should be produced and the price at which the goods are offered for sale.Joseph Stalin was the leader of the USSR from 1924 to 1953. He realized that his country was going to no where without industrialized, thus found the need of creating a command economy. </span>
Answer:
After three half-lives, it is 7:1
Explanation:
- The rate at which the decay of the radioactive isotope is said to be half-life and is represented as the half-life of the atoms and the matter to disintegrate itself.
- The two radioactive isotopes are K 40 and Ar 40. After the K-Ar dating, they contain minerals such as the clay mica and the temphra minerals and Half-life of the K 40 is 1.3 more than 100,000 years i.e 10x9 years for Ar 40.
- <u>Thus the K 40 has to divide as three half-lives have passed if the ratio of argon to potassium atoms is 7:1. At the end of one half-life, the ratio of the number of argon to potassium atoms is 1:1. and two half lives its 3:1 thus after the third half-life it becomes as 7:1.</u>
It’s D. In upper Canada it’s to cold for most people. Hope This helps. Please Mark as Brainliest
To escape communism and oppression
