Final answer:
The domain of function g is [0, 20], and the range is a single value {10}, both expressed in interval notation.
Step-by-step explanation:
The question pertains to finding the domain and range of a function g given its graph and expressing the answer in interval notation. Since the provided details mention another function, f(x), defined for 0 ≤ x ≤ 20 as a horizontal line with f(x) = 10, it is reasonably inferred that this description applies to function g.
Therefore, for the function g, the domain in interval notation would be [0, 20], as it is defined between x = 0 and x = 20, inclusively. The range of g, on the other hand, would be [10, 10], or simply {10}, indicating that the function output is constantly 10 over the entire domain.