Please explain this step by step

Write each expression in exponential form and find its value. 2 x 2 x 2 x 2

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?