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OpenStudy (anonymous):
Write the number in scientific notation. In a certain city, the subway system carried a total of 1,890,000,000 passengers
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OpenStudy (anonymous):
1.89x10^9, just count the number of decimal places
OpenStudy (anonymous):
10^1=10 10^2=100 10^3=1000 10^4=10000 10^5=100000 ... 1,000,000,000=10^9 1890,000,000=1.89*10^9
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