The population in a certain country was 10,900,000 in 1990 and 17,100,000 in 2005. The doubling time of the population is:
A) 52.7 years
B) 53.6 years
C) 31.3 years
D) 23.1 years
E) none of the above

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The Answer of The population in a certain country was 10,900,000 in 1990 and 17,100,000 in 2005. The doubling time of the population is:
A) 52.7 years
B) 53.6 years
C) 31.3 years
D) 23.1 years
E) none of the above

The Population in a Certain Country Was 10,900,000 in 1990