For this case we have the following expression:
[tex]\frac {1} {1000000}[/tex]
The expression is equivalent to: [tex]0.000001[/tex]
Converting to scientific notation we have:
[tex]1 * 10^{ -6}[/tex]
The exponent must be negative because the zeros are on the left side. The decimal point is run six times to the left.
Answer:
[tex]1 * 10^{ -6}[/tex]