Answer:
a). (5,30) (0,20)
b). (40,130) (35,120)
Step-by-step explanation:
a). (5,30) (0,20)
solid red line's solutions are all going to be going down and dashed blue line's solutions will be going up all solutions in those regions are considered solutions
b). (40,130) (35,120)
points are non-solutions because they are not in the shaded region for either line's solution .
haven't done this in a hot minute so im not sure 100%
The area of a circle (A) with radius "r" is:

To solve this question, follow the steps below.
Step 01: Find r.
The radius is half the measure of the diameter.

Given D = 12 feet, then:

Step 02: Find A.
Use r = 6 feet to find A.

Answer: The area is 36π square feet.