(1.3×10 −2 )×(0.05) written in scientific notation

Simplify the expression 10/11(22z) + (a+5) -1

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?

52 cm radius = diameter = area = circumference = circumfer