Answer:
0.33 ⋅ 10^−15
Explanation:
Scientific notation requires exactly one non-zero digit to the left of the decimal point.
The number ...
0.33 ⋅ 10^−15
has no non-zero digits to the left of the decimal point. It is not in "scientific notation."
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Additional comment
Expressed in scientific notation, it would be ...
3.3 ⋅ 10^−16