4) Find BC 6. 17° 14

48. Distance between a Ship and a Submarine From an airplane flying over the ocean, the angle of depression to a submarine lying under the surface is 24° 10'. At the same moment, the angle of depression from the airplane to a battleship is 17° 30'. See the figure. The distance from the airplane to the battleship is 5120 ft. Find the distance between the battleship and the submarine. (Assume the airplane, subma- rine, and battleship are in a vertical plane.) 17° 30' 24° 10' 5120 ft Battleship Submarine

13. Fill in the missing measurements X 60° 24 of the 30-60-90 triangle below. a. x = 12√3; y = 12 b. x = 12; y = 12√3 c. x = 12√2; y = 12 d. x = 12; y = 12√2 30° A B DO D C E

30° 7. The exact height of a right triangle with base angle 30" and base 7 is Use if needed.