A large helium balloon is tethered to the ground by two taut lines. One line is 100 ft. long and makes an 80 degree angle with the ground. The second line makes a 40 degree angle with the ground. How long is the second line?

An airplane is flying at an elevation of 5150 ft, directly above a straight highway. two motorists are driving cars on the highway on opposite sides of the plane, and the angle of depression to one car is 35 ̊ and to the other is 52 ̊. how far apart are the cars?