Answer:
D. 13.02
Step-by-step explanation:
Apply trigonometric function to find the height (h) of the wall.
Reference angle = 40°
Hypotenuse = 17 ft
Adjacent = h (height of the wall)
Apply CAH:
Cos 40 = Adj/Hyp
Cos 40 = h/17
17*Cos 40 = h
13.0227555 = h
h ≈ 13.02 ft
