9900 because you divide 99000 by 10
The 3 inside angles of a triangle need to add up to 180 degrees.
You have two angles of 104 and 36.
A = 180 - 104 - 36 - 40
The answer is 40
It should be the top left because the shaded area is below (or less than) the line -3/4x +1 and greater than the other line
