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OpenStudy (anonymous):
In 2007, the population of North America was approximately 5.15 x 10^8 people and the population of South America was approximately 3.04 x 108 people. What is the combined population of North and South America for this year? A) 8.19 x 10^16 people B) 8.19 x 10^9 people C) 8.19 x 10^8 people D) 8.19 x 10^64 people
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