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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