Erica works in the ticket booth at the local skating rink . On Thursday afternoon , she sold 66 total tickets . Of the tickets she sold , 1/3 were adult tickets and the rest were student tickets . What was the total number of student tickets Erica sold ?

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?