Question

What is the domain of the function y= (square root) x+4

Answer 1

0 ≤ x ≤ ∞

Explanation:

Square roots always need to be either equal to or greater than zero because it should be positive inside (unless we're working with imaginary numbers).

So the domain would be that x ≥ 0 (or the third choice ⇒ 0 ≤ x ≤ ∞).