ANSWER
[tex]n(A)=55[/tex]EXPLANATION
We want to find the number of terms that are in the set of integers between -28 and 28.
From, -28 to 28, we have 27 negative integers, 27 positive integers, and 0.
Therefore, the number of terms that are in the set of integers between -28 and 28 is:
[tex]\begin{gathered} n(A)=27+27+1 \\ n(A)=55 \end{gathered}[/tex]