Respuesta :

kindaalwardi173

Answer:

You had it correctly chosen, (9, infinity)

Step-by-step explanation:

Good job =)

kudzordzifrancis

ANSWER

[9,∞)

EXPLANATION

The given radical function is ;

[tex]f(x) = \sqrt{x - 9} [/tex]

This function is defined if and only if the expression under the radical sign is greater than or equal to zero.

[tex]x - 9 \geqslant 0[/tex]

[tex]x \geqslant 9[/tex]

Or

In interval notation, we have

[9,∞)