Answer:
8.5%
Step-by-step explanation:
I=PRT
85= 2000*r*0.5
85=1000r
0.085=r
uhm you know the excrotery system to the factor
Angles W, Z, M, P are 111°
Angles Y, X, O, N are 69°
1.5
I am sure of my answer !!!!
Hope it helped :)