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Answer: Choice D</h3>

Domain = [-3, infinity)
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Work Shown:

In step 2, we replaced every x with g(x)
In step 3, we plugged in g(x) = sqrt(x+3)
The domain of g(x) is [-3, infinity), so this is the domain of
as well since the composite function depends entirely on g(x). Put another way: the input of f(x) depends on the output of g(x), so that's why the domains match up.
.04*7115.68=284.6272
$284.62 or $284.63 (depending on how lenient your teacher is with rounding)
No because y=5 is a horizontal line on a graph, in this scenario the x-values would stay the same