To determine the dimensions of the given matrix, you need to identify the number of rows and columns it contains. The given matrix is:
[tex]\[
\left[\begin{array}{c}
2.5 \\
-3 \\
-1.6 \\
10.0
\end{array}\right]
\][/tex]
Here, you can observe the following:
1. Each entry of the matrix is located in a separate row.
2. The matrix has one single column.
To summarize:
- The matrix has [tex]\(4\)[/tex] rows.
- The matrix has [tex]\(1\)[/tex] column.
Therefore, the dimensions of the matrix are [tex]\(4 \times 1\)[/tex].
So, the correct answer is:
[tex]\[ \boxed{4 \times 1} \][/tex]