The general form of scientific notation can be written as a×10n, where n is an integer. Find the range of a.
A
1<a≤10
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B
1≤a<10
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C
1≤a≤5
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D
1<a<10
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Solution
The correct option is B1≤a<10 The general form of scientific notation can be written as a×10n, where 1≤a<10 and n is an integer.
For example, the scientific notation of 78000.0 is 7.8×104(moving the decimal point 4 places to the left) and not 78×103 because 78 does not lie in between 1 and 10.