You review a lease for a new apartment. the lease requires you pay the first month's rent, last month's rent and a security deposit of one month's rent, at the time of signing. the monthly rent is $500. how much will you need at the time of signing?

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?