Find the range of k that makes the given equation has 2 real roots (α>0, β>0, α<β)
(Discriminant, Axis of Symmetry, Y-intercept and Inequalities.)
1. x²-2(k-1)x+3-k=0

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?