Emily measures 3 pieces of string. the first piece measures 642 cm. the second piece measures 124 cm, and the third piece is 134 cm. how many meters of string does she have altogether? (hint: 1 meter equals 100 centimeters)

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?