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GMAT 考满分题库

- 数学PS -
The age of the Earth is approximately {1.3}*{10}^{17} seconds, and one year is approximately {3.2}*{10}^{7} seconds. Which of the following is closest to the age of the Earth in years?
  • A{2.5}\cdot{10}^{9}
  • B{4.1}\cdot{10}^{9}
  • C{1.9}\cdot{10}^{10}
  • D{2.5}\cdot{10}^{11}
  • E{4.1}\cdot{10}^{11}
显示答案
正确答案: B

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