The center of a pipe with a diameter of 0.5 in. is located 10 in. from a mirror with a parabolic cross section used as a solar collector. the center of the pipe is at the focus of the parabola. a. write an equation to model the cross section of the mirror. b. the pipe receives 25 times more sunlight that it would without the mirror. the amount of light collected by the mirror is directly proportional to its diameter. find the width of the mirror.