Move the decimal point to immediately after the first non-zero digit.
That is, move the decimal point 8 places to the right. The number of positions moved is the magnitude of the index. Plus for a move left, minus for a move right. So 8 mover to the right is -8.
Therefore, the scientific notation is 2.56*10-8
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It is 8.9*10^-5 in scientific notation
It is: 3.32*10^-3 in scientific notation
It is: 1.95*10^14 in scientific notation
1,000,000 in Scientific Notation = 1 x 106
1,550 in Scientific Notation = 1.55 x 103