Alexei wants to hang a mirror in his boat and put a frame around it. the mirror and frame must have an area of 19.25 square feet. the mirror is 3 feet wide and 5 feet long. which quadratic equation can be used to determine the thickness of the frame, x? . a. 2x2 + 8x - 19.25 = 0. b. 3x2 + 5x - 19.25 = 0. c. 4x2 + 16x - 4.25 = 0. d. 4x2 + 16x + 15 = 0