Answer:
x =
, 
Step-by-step explanation:
6 = x^2 - 10x
0 = x^2 - 10x - 6
Let's use the quadratic formula. (
)

x = 
= 5 +- 
x =
, 
75%. Just divide 15/20 and you will get .75 then multiply by 100 to turn the decimal to a percent
Answer:
BD
Because it is straight line segment that passes through center from one point in circumference to other