A Vertical Cross Section of a Cooling Tower Is a Portion

question 93

Multiple Choice

A vertical cross section of a cooling tower is a portion of a hyperbola, as shown in the diagram below. The standard form of the equation of the hyperbolic cross section is where x and y are measured in feet. The horizontal cross sections of the tower are circles. Find the radius of the top of the tower. Round to the nearest foot.

• A)90 feet
• B)88 feet
• C)93 feet
• D)87 feet
• E)85 feet

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