The number of whole number is 23 through subtracting the numbers. hope it helps ☺️
Answer:
The last one
Step-by-step explanation:
You start off with 50.
It says the water is being drained so the slope is negative.
Hi
exponnential cannot be negative. So A is out
quadratic function cannot also. So B is out.
C is the only one remaining...
Answer: Choice C. 
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Explanation:
The domain is the set of all allowed x inputs.
Here we see that x = -3 is the smallest x value possible as it is from the left-most point. The graph goes on forever to the right, so there is no largest x value. Effectively infinity is the largest x value even though infinity is not a number.
We can say the domain is
which can be simplified to
or 
In short: x can be -3 or larger.
This makes no sense but that would be fire