Help me with this :)

Someone which statements are true? check all that apply.

How can you use synthetic substitution to tell whether a given binomial is a factor of a polynomial?

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?