The cross-section of a searchlight mirror is shaped like a parabola. The light bulb is located 6 centimeters from the base along the axis of symmetry. If the mirror is 15 centimeters across at the opening, find its depth in centimeters. (Round your answer to the nearest tenth if necessary.)

38+105= 143, 39+104=143, and you will find then adding the numbers on opposite sides, moving inwards yields the answer 138 every time. because of this, you’re going to multiply 138 times the number of pairs, which is 34. therefore, 34*138= 4692(i’m sorry if it’s the wrong numbers, but it’s the right concept)

The second and fourth answer are correct