Answer: Casey is standing 52.5 feet from the lighthouse Step-by-step explanation: A right angle triangle is formed. The height of the lighthouse represents the opposite side of the right angle triangle. The distance, h from the lighthouse to where Casey is standing represents the adjacent side of the right angle triangle. Casey's line of sight along the angle of elevation represents the hypotenuse. To determine h, we would apply the tangent trigonometric ratio. Tan 0, =opposite side/adjacent side. Therefore, Tan 58 = 84/h h = 84/tan 58 = 84/1.6 h= 52.5 feet