during the first week of a certain month, a computer store sells 11 computers. a sale begins on the second week of the month and during the second week, the computer store sells 17 computers. what was the percent increase in sales from the first week of the month to the second week of the month?

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?