The Gateway Arch monument in St. Louis, Missouri is the tallest man-made monument in the western hemisphere and the tallest arch in the world. It was built in the mid 1960’s as a testament to the westward expansion of the United States. It is 630 feet tall and 630 feet wide (at its base).   Suppose the city of St. Louis wants to celebrate its anniversary by hanging a 14,400 square foot banner from the arch. The bottom of the banner is to be 300 feet above the ground and equally distant from each side of the arch.  There will be a chain attaching the top left and right corner of the banner to the arch. Use a quadratic function (that models the height of the arch as a function of distance from a specified point) to find the length of each chain.   Calculate the coordinates where the tops of the chains will attach to the arch.  Show all of your work.  Plot and label them on your graph.

Elementary Geometry For College Students, 7e
7th Edition
ISBN:9781337614085
Author:Alexander, Daniel C.; Koeberlein, Geralyn M.
Publisher:Alexander, Daniel C.; Koeberlein, Geralyn M.
Chapter9: Surfaces And Solids
Section9.2: Pyramids, Area, And Volume
Problem 29E
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The Gateway Arch monument in St. Louis, Missouri is the tallest man-made monument in the western hemisphere and the tallest arch in the world. It was built in the mid 1960’s as a testament to the westward expansion of the United States. It is 630 feet tall and 630 feet wide (at its base).

 

Suppose the city of St. Louis wants to celebrate its anniversary by hanging a 14,400 square foot banner from the arch. The bottom of the banner is to be 300 feet above the ground and equally distant from each side of the arch.  There will be a chain attaching the top left and right corner of the banner to the arch. Use a quadratic function (that models the height of the arch as a function of distance from a specified point) to find the length of each chain.

 

Calculate the coordinates where the tops of the chains will attach to the arch.  Show all of your work.  Plot and label them on your graph. 

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