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At the end of the 20th century, the world population was approximately 6.1×10  9   people. Express this population in usual form. How would you say this number in words?

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In standard form of a number we put decimal after first digit and remaining power is written as power of 10 Given at the end of the 20 th century, the world population was approx 6.1×10 9 , which is standard form So, Population of people in usual form =6.1×10 9 =6100,000,000. Thus, the population of the people is six thousand one hundred million.
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