Using correct mathematical notation and symbols, express the following in set-builder notation:

Z = {16, 17, 18, 19, 20}

To express the set Z = {16, 17, 18, 19, 20} in set-builder notation, we represent it as:

Z = {x | x is an element of Z such that 16 ≤ x ≤ 20}

In this notation, the vertical bar "|" separates the variable x from the condition, and the condition states that x must be an element of Z (the set of integers) and must satisfy the inequality 16 ≤ x ≤ 20, which means x is greater than or equal to 16 and less than or equal to 20.