Topic: parabolic arch list of topics
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15 items are filed under this topic.

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	A parabolic arch		2012-01-04
		From Swathi: A plan for an arch in the shape of a parabola is drawn on a grid with a scale of 1m per square. The base of the arch is located at the points (0,0) and (15,0). The maximum height of the arch is 18m. a)Determine the quadratic function that models that arch b)State the domain and range of the function Answered by Penny Nom.
	Will the ball clear the tree?		2010-11-14
		From MK: Sam hits a golf ball with a five-iron a distance of 120m horizontally. A tree 45m high and 35m in front of Sam is directly in the path of the ball. Will the ball clear the tree if the ball makes a parabolic curve and has a maximum height or 80m? Answered by Brennan Yaremko.
	A parabolic arch		2009-03-28
		From Jeni: A doorway is in the shape of a parabolic arch. Find the width of the doorway 1m above the floor. Given: the height and the width of the doorway is 4m and 3m respectively. Answered by Penny Nom.
	Archimedes' formula for parabolic arches		2009-01-23
		From La: Use calculus to verify Archimedes' formula for y=9-x^2. Prove Archimedes' formula for a general parabolic arch. Answered by Harley Weston.
	A bridge is built in the shape of a parabolic arch		2008-06-02
		From megan: A bridge is built in the shape of a parbolic arch. The bridge has a span of 192 feet and a maximum height of 30 feet. Find the height of the arch at 20 feet from its center. I need the equation and what to fill into the equation...please and thankyou! Answered by Penny Nom.
	A parabolic arch		2008-02-14
		From Angela: A parabolic arch has an equation of x^2 + 20y - 400 = 0 where x is measured in feet. How do I find the maximum height of the arch? Answered by Penny Nom.
	parabolic arch		2007-10-24
		From ABHILASH: How find parabolic arch perimeter. Answered by Harley Weston.
	Parabolic arch		2007-10-09
		From Nisa: A parabolic arch has a span of 120 feet and a maximum height of 25 feet. Choose suitable rectangular coordinate axes and find the equation of the parabola. Then calculate the height of the arch at points 10 feet,20feet,and 40 feet from the center. Answered by Stephen La Rocque.
	A parabolic arch		2007-03-29
		From A student: I am trying to figure out how to work this problem as it doesn't have many details. The problem ask for an equation to satisfy a parabolic arch y = 16 - 0.25x^2 for y>=0. Find the width w of the arch. Answered by Stephen La Rocque.
	The width of an arch		2007-03-28
		From Brad: A parabolic arch satisfies the equation y= 16 - 0.25x^2 for y >= 0. Find the width w of the arch. Answered by Penny Nom.
	A roadway over a river		2007-03-12
		From Taranjeet: My teacher has given us bridge with only one measurement. From the river to the roadway is 50 metres in length (vertically) The question he wants us to find out is. What is the distance between the vertical supports. He has said that: At a horizontal distance of 'x' metres from the foot of the arch the height of the arch, the height of the arch above the river 'h' metres is given by: h=-1/40(x squared) = 3x I don't understand how to find the distance between the support beams. Thank you Answered by Penny Nom.
	Can the trailer safely pass under the bridge?		2007-01-02
		From Jim: A truck hauling a double-wide trailer needs to pass under a parabolic-arched bridge en route or take a 50 mile detour. The trailer is 14 feet high and 15 feet wide. The arch supporting the bridge at this underpass is 18 feet high at the center and 40 feet wide at the base. Can the trailer safely pass under the bridge? Answered by Stephen La Rocque.
	A fountain of water jets forms parabolic arches		2006-05-03
		From Jennifer: Let's say in you have a fountain and the water jets form parabolic arches. The center of the fountain, being the origin of the coordinate system, it is elevated 5 feet off the ground, . The equation formed the water arch is y= -x2+4x, what is the radius of the basin needed to catch the water at ground level? Answered by Stephen La Rocque.
	A parabolic arch		2006-05-02
		From Mike: A bridge over a river is supported by a parabolic arch...arch is 200 m wide at water level...the maximum height of the arch is 80 m..what is the height of the arch measured from a point on the water 40m from the center of the arch? Answered by Stephen La Rocque.
	A parabolic arch		2004-01-19
		From Teresa and Robyn: A bridge over a river is supported by a parabolic arch...arch is 200 m wide at water level...the maximum height of the arch is 80 m..what is the height of the arch measured from a point on the water 40m from the centre of the arch Answered by Penny Nom.

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