The notation \( 2.6E5 \) is in scientific notation, where \( E \) represents "times ten raised to the power of." Thus, \( 2.6E5 \) can be written as:
\[ 2.6 \times 10^5 \]
To express this in standard form (a regular number), you need to calculate:
\[ 2.6 \times 10^5 = 2.6 \times 100000 = 260000 \]
So, \( 2.6E5 \) in standard form is:
\[ 260000 \]