Well once I get out meh handy dandy calculator. I'm bad at explaining. 175 - 12% = 154. Hope it helps.
Answer:
36π
Step-by-step explanation:
The formula for the area of a circle is π times radius squared.
The radius in this case is 6, so squaring it gets us 36.
Multiplying this by π gets 36π.
Remember, for

the x value of the vertex is

so
given
x value of vertex is -5
and



multiply both sides by a
5=-5a
divvide both sides by -5
-1=a
a=-1

comlete the square
remember if we do

(h,k) is the vertex
I know, we can subsitute the known values of te vertex
-5 for h and 20 for k then expand





a=-1
c=-5
(5200 - 3140) / 5200.......* 100
2060 / 5200......* 100
0.396 * 100 =
39.6% rounds to 40% <===
The line x = 2 is vertical. This means that ab is horizontal since they are perpendicular. So, the y coordinate of b must be 1.
If x = 2 bisects ab, then a and b are equal distances from x = 2.
a is 2 - (-4) = 6 units away from x = 2, so b must be 6 units away in the other direction. The x coordinate of b is 6 + 2 = 8.
The coordinate of b is (8, 1)