Verified Answer :

sleepyjess

Since x+4 is under the square root, that's all we need to focus on for the domain. The square root can't be negative, so x+4 MUST be greater than or equal to 0. 

\(x+4 \geq 0\)
Subtract 4 from both sides
\(x \geq -4\)
That's the domain

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