An engineer tests air conditioner compressors made with a new design to see if fewer have operational defects than those made with the previous design. the z score for the observed success rate in this sample is z=-1.82. what should the researcher conclude?

Factor this polynomial completely x^2-64

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?

What is the value of m in the equation 1/2 m - 3/4n=16 when n=8