Butch has a collection of 80 vinyl records from throughout the 20th century including nine from the 40s, four from the 50s, eleven from the 60s, eight from the 70s, and 16 from the 80s. If he randomly selects one from his collection of 80, find the probability it will be from each of the following decades. The probability that it is from the 40s is

You are measuring the dimensions of the floor in your bedroom because you are planning to buy new carpet. which unit of measure is the most appropriate to use in this situation?

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?

Pls the last one and it has to be like number 6