You must isolate C. See attached photo. Hope it helps. (Sorry it’s messy...written by finger on my phone.)
Answer:
0.1
Step-by-step explanation:
12/ sin(113.17) = b/ sin (37.81)
so b= 8
ROI mean Return Of Investment
The answer is D. You’d need to minus the area of the circle away from the area of the triangle to get the area of the shaded region