Need to find derivative of y=4x^3+8^1/3/(x+2)^5

Terri makes a quilt using three sizes of fabric squares the side lenght of each fabric square is the square root of the area

What expression is equivalent to 42x-56y

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?