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Which number is not in scientific notation? 11 ⋅ 1021 5.7 ⋅ 109 3.1 ⋅ 10−12 1.67 ⋅ 10−5
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Which number is not in scientific notation? 11 ⋅ 1021 5.7 ⋅ 109 3.1 ⋅ 10−12 1.67 ⋅ 10−5

User Showaltb
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The first one is not in scientific notation because the first number that is being multiplied by 10ˣ must be ranging from 1 to 10 but 11 is outside that range. Hope this helps!
User Zambezi
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