A pedestrian suspension bridge built above a road is supported by a parabolic arch. The height in feet of the arch is given by the equation H(x) = x(13.5-x) answer key

Will mark the brainliest.paula makes stained-glass windows and sells them to boutique stores. if her costs total $12,000 per year plus $4 per window for the frame. how many windows must she produce to earn a profit of at least $48,000 in one year if she sells the windows for $28 each?