A concrete bridge is designed as a parabolic arch. The road over bridge is 60 m long and the maximum height of the arch is 15m. What is the equation of the parabola.

A bridge has a parabolic arch that is 10 m high in the centre and 30 m wide at the bottom. Find the height of the arch 6m from the centre, on either sides.

An arch is in the form of a parabola with its axis vertical. The arch is 10 m high and 5 cm wide at the base. How is it 2 m from the vertex of the parabola ?

An arch is in the form of a parabola with its axis vertical. The arch is 10 m high and 5 m wide at the base. How wide is it 2 m from the vertex of the parabola ?

An arch is in the from of a parabola with its axis vertical. The arch is 12 m high and 6 m wide at the base. How wide is it 6 m from the vertex of the parabola ?

A search light has a parabolic reflector (has a cross section that forms a 'bowl'). The parabolic bowl is 40 cm wide from rim to rim and 30cm deep. The bulb is located at the focus. (1) what is the equation of the parabola used for reflector? (2) How far from the vertex is the bulb to be placed so that the maximum distance covered?

The arch of a bridge has dimensions as shown, where the arch measure 2 m at its highest point and width is 6 m. What is the radius of the circle that contains the arch ?

An engineer designs a satellite dish with a parabolic cross section . The dish is 5m wide at the opening, and the focus is placed 1.2 m from the vertex. (a) Position a coordinate system with the origin at the vertex and the x-axis on the parabola 's axis of symmetry and find an equation of the parabola. (b) find the depth of the satellite dish at the vertex.