Answer:
A. x ≥ 0
Explanation:
Domain is the set of x-values that can be inputted into function f(x).
We see that our x-values span from 0 to infinity. Since 0 is closed dot, it is included in the domain:
[0, ∞) or 0 ≤ x < ∞ or x ≥ 0
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