All I can say is that your equation is wrong
Answer:
19 cents
Step-by-step explanation:
divide 20 by 6
Radius of curvature = 10'
Diameter of circle = 2 * 10' = 20'
height of segment = 2'
Let semi-chord be x.
Then by the intersecting chord property,
2*(20-2)=x^2
x^2=36
x=sqrt(36)=6
=>
chord=2x=2*6=12'
#1 is correct!
#2 is D - ASA
Hope this helps!! :)