If x^4=y, then x is the fourth root of y. explain how to estimate the fourth root of 30. find the fourth root of 30 to the nearest whole number. (this is urgent plz )

Find the slope of the line that contains the following points. r(-2, 4), s(6, -2)

Which value is not a solution of 8x^3 – 1 = 0

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?