Answer:
The answer is D (40 inches)
For this case we have the following function:

The first thing you should do is graph the function to see the behavior.
When observing the graph (in the attached image) we observe that the following point belongs to the graph:

To prove it, let's evaluate the point in the function:

The equation is fulfilled and therefore the point belongs to the graph.
Answer:
(6.2, 7.4)
See attached image
Answer:
A = 78.5 cm^2
Step-by-step explanation:
The area of a circle is given by
A = pi r^2
We know r =5 and pi = 3.14
A = 3.14 (5^2)
A = 3.14 (25)
A = 78.5 cm^2
So if you need 1/2 cup for a 3-layer, then it means that you need a third of that for a one-layer. you need to divide 1/2 by 3. It is easier to get that if you use another form of 1/2, for example 3/6. In this case you simply divide this by 3 and you'll get 1/6.
Answer:
120 i think im pretty good a geometry