It says decreasing so you have to turn it into a percent (.06%) and then sub tract that from 1. After that you put that into an equation.
Answer:
1. I have simplified the first question:

2. I have found the parabola properties:

Answer:
That would be the 3rd explanation, the plane has 4 points.
Step-by-step explanation:
Answer:
Option 3: 
Graph C
Step-by-step explanation:
Find the solution of 

(multiplication property of equality)
Divide both sides by -1. Since we are dividing by a negative number, the sign would change

This means that the possible values of x are 8 and any number above 8.
Graphing this, the arrow of directed line would start at 8 and move towards our right hand.
Thus, the graph would be graph C in option C.