Which function has the domain x is greater than or equal to negative 11 ?

For a square root to be real, the expression inside it must be at least 0. In choice D, the expression under the square root is x + 11, so x + 11 ≥ 0, which gives x ≥ −11. Therefore, choice D, “y is equal to square root of x plus 11 end root plus 5,” has the stated domain.

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