Question 762885
Arrange in Cartesian points.  Car B travels along the positive x axis from the origin; and car A travels 60 degrees rotated counterclockwise from the origin.  The coordinates for B after two hours are (100, 0).  The coordinates for A after two hours are (120*cos(60), 120*sin(60)).  That is, for A, (120*(1/2), 120*sqrt(3)/2).  Simplifying more, A is at (60, 60*sqrt(3)).


Now, use the distance formula to find the distance from (100, 0) to (60, 60*sqrt(3)).  I am letting you do that part.