Answer:
B is the answer because a function is if none of the x values are the same with different y values.
She will have enough for the cat and dog food.the 6 cat food bags will be $108
So hmm notice the picture below
thus, the perimeter of the gutter is just w + w + l, or 2w +l
thus
take the derivative of A(w), zero it out, check any critical points in the interval of (0, 22), for a maxima
recall, the aluminum sheet is just 22inches long, thus, whatever the "depth" or "w" is, has to be more than 0, and less than 22