Solve the Problem $54 \mathrm { ft }$ At the Center $92 \mathrm { ft }$

question 4

Multiple Choice

Solve the problem.
-A nuclear cooling tower cross section is a hyperbola having a diameter of $54 \mathrm { ft }$ at the center. The distance between the two foci is $92 \mathrm { ft }$ . What is the equation for the hyperbola?

• A) \(\frac { x ^ { 2 } } { 729 } - \frac { y ^ { 2 } } { 1387 } = 5\)
• B) \(\frac { x ^ { 2 } } { 729 } - \frac { y ^ { 2 } } { 1389 } = 1\)
• C) \(\frac { x ^ { 2 } } { 729 } - \frac { y ^ { 2 } } { 2116 } = 1\)
• D) \(\frac { x ^ { 2 } } { 729 } - \frac { y ^ { 2 } } { 1387 } = 1\)

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Definitions:

Flexible Budget

A budget that adjusts or flexes with changes in volume or activity levels, allowing for better budget-to-actual comparisons.

Favorable Spending Variance

A situation in which actual spending is less than the budgeted or projected amount, indicating cost efficiency.

Actual Cost

The real cost incurred in the production of goods or services, including all direct and indirect expenses.

Static Planning Budget

A budget based on a single level of activity, not adjusted for changes in activity levels during the period.