Determine the critical​ value(s). Select the correct choice below and fill in the answer box to complete your choice. ​(Round to two decimal places as​ needed.) A. plus or minus±z Subscript alpha divided by 2zα/2equals=plus or minus±nothing B. z Subscript alphazαequals=nothing

Organisms that live in the alpine and taiga biomes have developed unique adaptations that aid in their survival. the douglas-fir is a conifer tree that grows in the taiga biome. it has an average height of about 70 feet, and its wood is an important source of lumber.

Find the required measurements of the following trapezoids. a = 8 cm b = 16 cm h = 10 cm

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?