Final answer:
To find the functions (a), (b), (c), and (d) and their domains, we need more specific information or context as the question provided is incomplete.
Step-by-step explanation:
Quadratic functions are widely used in various fields, including physics, engineering, economics, and computer science. They provide a simple yet powerful model for describing a wide range of real-world phenomena.
To find the functions (a), (b), (c), and (d) and their domains, we need more specific information or context as the question provided is incomplete.