Arelation  r  is defined by this list of ordered pairs:         (4, 6), (5, 7), (3, 7), (4, 6), (5, 5), (6, 4) what is the domain of relation  r? a.{4, 5, 3, 4, 5, 6} b.{6, 7, 7, 6, 5, 4} c.{3, 4, 5, 6} d.{4, 5, 6, 7}

Kayla wants to find the width, ab, of a river. she walks along the edge of the river 65 ft and marks point c. then she walks 25 ft further and marks point d. she turns 90° and walks until her location, point a, and point c are collinear. she marks point e at this location, as shown. (a) can kayla conclude that δ and δ are similar? why or why not? (b) suppose de = 15 ft. what can kayla conclude about the width of the river?