It's a geometric progression where

The answer is going to be:
102,500
Hopes This Helps:)
If you're finding the value of z, z would equal 13/2 or 6.5
:)
In order to solve the formula

in terms of d, you simply have to divide both sides by pi:

The total height of the earring is the sum of the diameters of the circles. Given their circumferences, the diameters are

So, the total height is

Answer:
100 points
Step-by-step explanation:
-75 + 200 = 125
125 - 25 = 100