Drawing a diagram to match this figure, BC would have to be the hypotenuse as it is the longest side of the triangle. Angle A would have to be the right angle.
For the first choice,

. The first choice is not correct.
The second choice gives us

. The second choice is not correct either.
The third choice gives us
Using the intersecting chord theorem:
15 x 2 = 5 x n
Simplify:
30 = 5n
Divide both sides by 5:
n = 30/5
n = 6 m
8 x n+8 = 16 x n+2
Simplify:
8n +64 = 16n +32
Subtract 8n from both sides:
64 = 8n +32
Subtract 32 from both sides:
32 = 8n
Divide both sides by 8:
n = 32 /8
n = 4
Can do.
Arc length = radius * theta.
S=r*theta
Convert 73° to radians.
(73°)*(pi/180)
73°=1.274rad
S=(6.48in.)(1.274rad) = 8.255 in = final answer
I hope this helps its step 2 gl