Stephanie has 7 pairs of blue pants, 1 pair of white pants, 3 pairs of black pants, and 3 pairs of brown pants. If she chooses one pair of pants, what is the probability that they are not brown?

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?