Aspotlight is made by placing a strong light bulb inside a reflective paraboloid formed by rotating the parabola x^2=4y around its axis of symmetry (assume that x and y are in units of inches). in order to have the brightest, most concentrated light beam, how far from the vertex should the bulb be placed? express your answer as a fraction or a decimal rounded to two decimal places.

Nthe diagram, bc¯¯¯¯¯∥de¯¯¯¯¯ . what is ce ? enter your answer in the box. m a triangle with vertices labeled as a, b, and c. side b c is base. sides a b and a c contain points d and e, respectively. a line segment is drawn from d to e. side a d is labeled 2 meters. side d b is labeled 10 meters. side a e is labeled 3 meters. base b c and line segment d e are marked with arrows pointing the same direction.