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**(a)** In 1980, the population of Country X was 57,000,000. In 2010, the population was 74,000,000.

**(b)** Write the population in 1980 in terms of significant figures.

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Here are five related questions for further exploration:

1. How do you calculate population growth rates over a given period?
2. What is the difference between significant figures and decimal places?
3. How do you round numbers to a specific number of significant figures?
4. What factors might contribute to population growth over a 30-year span?
5. How do you calculate the population doubling time given a growth rate?

**Tip:** When dealing with significant figures, always focus on non-zero digits for accuracy and precision in reporting data.

In 1980, the population of Country X was 57,000,000. In 2010, the population was 74,000,000. Write the population in 1980 in terms of significant figures.

Learn how to express the 1980 population of Country X (57,000,000) using significant figures. Understand the basics of significant figures, rounding, and precision in data reporting, suitable for middle school students (Grades 6-8).

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