Answer:
The answer is C.
Step-by-step explanation:
The answer is C (I am assuming that it isn't 5/2).
You would want to divide 6 by 2, getting x=3.
x ≈ 14.5
A = x²√(25+10√5)/4
A = 1.72a²
x² = A/1.72
= 363.27/1.72
≈ 211
x = √211
≈ 14.5