Question 721365
Domain is correct.  The domain is all x that keeps a non negative number under the square root.  That's [4, inf).<P>
The range is all possible values for f(x).<P>
When x = 4, f(x) = 0.  As x gets larger, f(x) gets larger and approaches infinity.  Graph it to see that the range goes up forever...infinity.  Range = [0, inf)
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