Find the average an experiment to determine how many breaths a fish takes per minute yields this data: minute 1:65 breaths, minute 2:73 breaths, minutes 3:67 breaths, minute 4:71 breaths, 5:62 breaths, calculate the average of breaths that the fish takes per minute.

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?