A bag of dog food weighs 20 lb. 15% of the weight is oats.

a) Set up an equation OR proportion to find the weight of the oats in the dog food.

b) What is the weight of the oats in the dog food? Show your work.

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?