That is a 45 degree angle on the side
1 - 0.16 = 0.84
21/0.84 = 25
25 grams of fiber should be consumed daily.
The correct answer would be d (2,-5)
Step-by-step explanation:

DBH make a triangle.
The three inside angles of a triangle need to equal 180
H = 180 - B - D
H = 180 - 39 - 36 = 105
H and X make a straight line that equals 180 degrees
X = 180 - H
X = 180 - 105 = 75 degrees.