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Which number is not in scientific notation? A. 11 times 10 to the 21st power? B. 5.7 times 10 to the 9th power? C. 3.1 times 10 to the -12th power? Or D. 1.67 times 10 to the -5th power?
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Which number is not in scientific notation? A. 11 times 10 to the 21st power? B. 5.7 times 10 to the 9th power? C. 3.1 times 10 to the -12th power? Or D. 1.67 times 10 to the -5th power?

User Azmeer
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A. it is not in scientific notation because the number in the ones place has to be greater than 0 but less than 9. So 11 is more than 9 so A is not in scientific notation.
User Nsivakr
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