The number \( 1.98E8 \) is already expressed in scientific notation. The "E" represents "times ten raised to the power of." Therefore, \( 1.98E8 \) can be written as:
\[ 1.98 \times 10^8 \]
This indicates that the number is \( 1.98 \) multiplied by \( 10 \) raised to the power of \( 8 \).