B i think on #2
hope this helps
The answer would be L because it is away from the rest ( outlier)
B
You would divide 45 mm/15mm to get 3. Multiply 3 by 27 to get 81 mm.
Step 1: x²-15=2x
step 2: x²-2x-15=0
step 3: (x-5)(x+3)=0
step 4: x-5=0 or x+3=0
step 5: x=5 of x=-3
Answer:

Explanation:
Since
is a diameter, arc 
Given that
is a subtended central angle by two diameters,
.
Using the rule of arcs,
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