Write an Equation for the Hyperbola $60 \mathrm { ft }$

Multiple Choice

Write an equation for the hyperbola.
-A nuclear cooling tower cross section is a hyperbola having a diameter of $60 \mathrm { ft }$ at the center. The distance between the two foci is $92 \mathrm { ft }$ . What is the equation for the hyperbola?

A) $\frac { x ^ { 2 } } { 900 } - \frac { y ^ { 2 } } { 1216 } = 5$

B) $\frac { x ^ { 2 } } { 900 } - \frac { y ^ { 2 } } { 1218 } = 1$

C) $\frac { x ^ { 2 } } { 900 } - \frac { y ^ { 2 } } { 2116 } = 1$

D) $\frac { x ^ { 2 } } { 900 } - \frac { y ^ { 2 } } { 1216 } = 1$