#### Answer

false

#### Work Step by Step

RECALL:
In the scientific notation $a \times 10^n$, $1 \le a \lt 10$, and $n$ is an integer.
The given expression has $a=18.68$, which does not meet the requirement that $1 \le a \lt 10$.
Thus, the given expression is not in scientific notation.
The given statement is false.