V=1 ; v=1-11)
Zv+2v 3v -40 =
A)5
B)-2
C)-8
D)3

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?

Express the following as a function of a single angle. cos(60) cos(-20) - sin(60) sin(-20)

The standard deviation for a set of data is 5.5. the mean is 265. what is the margin of error?