#### Answer

domain: $\left\{x| x \ge 0\right\}$

#### Work Step by Step

In $g(x) = \sqrt{x}$, the value of $x$ can be any non-negative real number. The value of $x$ cannot be negative because there is no real number that when squared gives a negative value.
Thus, the domain of the function in Exercise 6 is:
$\left\{x| x \ge 0\right\}$