The notation "2.976E–9" is already in scientific notation. It represents the number \( 2.976 \times 10^{-9} \).
In standard scientific notation, a number is expressed as \( a \times 10^n \), where \( 1 \leq a < 10 \) and \( n \) is an integer. In this case, \( a = 2.976 \) and \( n = -9 \). Thus, it is already correctly formatted.