Evaluate the Function at the Given Value of the Independent $f ( x ) = \sqrt { x + 20 } ; \quad f ( - 4 )$

question 75

Multiple Choice

Evaluate the function at the given value of the independent variable and simplify.
- $f ( x ) = \sqrt { x + 20 } ; \quad f ( - 4 )$

• A) 4
• B) \(- 4\)
• C) 2
• D) not a real number

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