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Standard form of an circle equation is $\"\"$ , where $\"\"$ is radius of the circle and $\"\"$ is radius.

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Maximum height of the Ferris wheel $\"\"$ feet.

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Diameter of the Ferris wheel $\"\"$ feet.

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The distance between ground and Ferris wheel $\"\"$ feet.

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$\"\"$

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$\"\"$ .

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Radius of the Ferris wheel $\"\"$ feet.

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Find the center of the Ferris wheel.

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The center of the wheel is on the $\"\"$ -axis.

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Since all $\"\"$ -coordinates on the $\"\"$ -axis is zero, the $\"\"$ -coordinate of the center is zero.

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$\"\"$ -coordinate of the center $\"\"$ feet.

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Center $\"\"$ .

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The equation of Ferris wheel :

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Substitute $\"\"$ and $\"\"$ in $\"\"$ .

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$\"\"$

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$\"\"$ .

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The equation of Ferris wheel is $\"\"$ .