Answer:
D. 0 < x < 20
Explanation:
Domain is in the x axis, Range lies in the y axis.
Here it is seen that function's domain lies between 0 to 20.
- Open circle's are used for '<' and '>'
- Closed circle's are used for '≤' and '≥'
Here, as the circle's are open. Domain: 0 < x < 20
Additionally,
