I believe it would be the radius of the circle.
The answer is d. All ratios on the chart divide out to 3.5 as d does the same
The distance between the points is 10.
Answer:

Step-by-step explanation:
Given
Geometric Sequence (GP)


Required
Determine T₁₂
The nth term of a GP is calculated as thus;

In this case;
;
and 
Substitute these values in the above formula



Open the bracket


<em>Hence, the 12th term of the sequence is </em>
<span>(-h^4)^5 is -h^20 (-h^4)^5 = -h^4×5 = -h^20</span>