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A footbridge is suspended from a parabolic support. The function h(x) = - 1/ 25x^2 + 9 represents the height in feet of the support above the walkway, where x = 0 represents the midpoint of the bridge.

a. Graph the function and determine its x-intercepts.

b. What is the length of the walkway between the two supports?

Guest Mar 23, 2017
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See the graph, here : https://www.desmos.com/calculator/qxifsitezx

 

a. The x-intercepts  are  (-15,0)  and (15,0)

 

b. The lengrh  of the walkway   =  15 - (-15)   =  15 + 15 =   30 feet

 

 

 

cool cool cool

CPhill  Mar 23, 2017

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