Determine Ratio of a to B $A = 36 \pi$ Square Inches Is the Area of a Circle with Diameter

Multiple Choice

Determine ratio of A to B. Round as indicated.
- $A = 36 \pi$ square inches is the area of a circle with diameter 12 inches. $B = 144$ square inches is the area of a square with sides of length $< 12$ inches. (Do not round.)

A) $\frac { 6 } { \pi }$
B) $\frac { \pi } { 4 }$
C) $\frac { 4 } { \pi }$
D) $\frac { \pi } { 6 }$