Ji'll lives 3 1/2 miles from school. one morning, her friend was giving her a ride. when they were 2/3 of the way to school, their car broke down & they had to walk the rest of the way.

David is spreading mulch on a triangular area of his flower bed. the coordinates of the vertices of the area are (1, 3), (9, 3), and (4, 6). what is the area of the triangle if each square has an area of 3 square feet?