Final answer:
The domain of the function f(x), which is a horizontal line and defined for 0 ≤ x ≤ 20, is the interval from 0 to 20, inclusive of both endpoints. Hence, the domain in interval notation is [0, 20].
Step-by-step explanation:
The function given in the question seems to contain a typo, so let's ignore that and address the provided information. For the function f(x), which is defined for 0 ≤ x ≤ 20, the graph is a horizontal line. This tells us that the function is a constant function over its domain. Since no other restrictions are given and x is a real number, the domain of f(x) is simply the interval from 0 to 20, inclusive of both endpoints because of the ≤ sign. Therefore, the domain of f(x) in interval notation is [0, 20].
The given function is g(z) = -722 - 15. The domain of a function refers to the set of all possible input values for which the function is defined. In this case, the function g(z) is a constant function since it does not contain any variable. Therefore, the domain is all real numbers.
In interval notation, we can represent the domain as (-∞, ∞).