The plc as value of 6 in12.6 is the tenths place
The red marble is farthest from the target.
One of the 2s are 200 the other is 20,5s 50,000 and then 5,00
The formula for this is

. If the diameter is 8 the radius is 4, so filling in accordingly we have

and

which is

and when you multiply in 3.14 you get that A = 401.92 or B above.