Which of the following is closest to?

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问题 Which of the following is closest to

选项 A、50,000
B、150,000
C、500,000
D、1,500,000
E、5,000,000

答案A

解析 The expression

can be simplified as follows.

Since

is between 4 and 5, it follows that 10⁴

is between 40,000 and 50,000. Therefore, of the five answer choices listed, 50,000 is closest to

. The correct answer is Choice A.
This explanation uses the following strategies.
Strategy 5: Simplify an Arithmetic or Algebraic Representation
Strategy 9: Estimate

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