Students deliver catalogues and leaflets to houses. one day they have to deliver 480 catalogues and 1520 leaflets. each student can deliver 15 catalogues or 80 leaflets in one hour. each student can only work for 8 hours

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?