Felix joins a local recreation center to play basketball. The recreation center charges a $75 annual fee, plus an additional $15 per month for usage of basketball courts. Felix prepays by writing a check of $240. How many months did Felix prepay

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?