Am a 5 digit number my tens digit is the sum of my hundreds digit and thousands digit. my tens digit is twice my one digit. my hundreds digit is 1 more than zero. my thousands digit is seven times my hundreds digit. my ten thousands digit is the same as my ones digit.

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?