The number \( 9.0 \times 10^5 \) is already expressed in standard form. In standard form, any number is represented as \( a \times 10^n \) where \( 1 \leq |a| < 10 \) and \( n \) is an integer.
In this case:
- \( a = 9.0 \)
- \( n = 5 \)
Since \( 9.0 \) is between 1 and 10, this is correctly formatted in standard form. If you want to convert it to decimal notation, it would be \( 900,000 \).