anonymous
  • anonymous
The underside of the bridge is an arch that can be modeled with the function y = –0.000475x2 + 0.851x, where x and y are in feet. How high above the river is the bridge (the top of the arch)? How long is the section of bridge above the arch?
Mathematics
katieb
  • katieb
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anonymous
  • anonymous
The bridge is about 1,791.58 ft. above the river, and the length of the bridge above the arch is about 381.16 ft. The bridge is about 1,791.58 ft. above the river, and the length of the bridge above the arch is about 895.79 ft. The bridge is about 381.16 ft. above the river, and the length of the bridge above the arch is about 895.79 ft. The bridge is about 381.16 ft. above the river, and the length of the bridge above the arch is about 1,791.58 ft.
anonymous
  • anonymous
to calculate the high of the bridge, just calculate the max value of the function, and the length just calculate the absolut value of the distance of the root of the function
anonymous
  • anonymous
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