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The length of a DNA nucleotide building block is about 1 nanometer, or 0.000000001 meters. Fill in the blank to write this number in scientific notation.

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Answer:

4

Step-by-step explanation:

The length of a DNA nucleotide building block is about 1 nanometer, or 0.000000001 meters.  Fill in the blank to write this number in scientific notation.

×10−9