See attached for the solution
Answer:

Step-by-step explanation:
Step 1:
Calculate the circumference of both circles.
The formula of a circumference:of a circle with radius r:

The circle R:

The circle S:

The length of the intercepted arc for circle R is

Step 2:
Calculate what the part of the circumference of the circle R is the intercepted arc:

The same length of the circumference of the circle S is searched for the length of the intercepted arc for circle S.
Step 3:
Calculate the length of the intercepted arc for circle S:

B. because there is a variable (2b - 5)
Answer:
8
Step-by-step explanation:
If you rotate the triangle you can see that the base is 16 and since WX is the mid segment that means it's half of the base so half of 16 is 8.
Answer:
A (50)
Step-by-step explanation:
Mean is the total numbers added up divided by the # of numbers.
There are 6 numbers.
51 + 60 + 80 + 32 + 47 + 30 = 300
300/6 = 50
Therefore, the answer is A.