1/-7b what is the nonpermissible replacement for b in this expression?

The product of two negative rational numbers is always zero sometimes zero never zero

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?

The function f(x) = 14,600(1.1)* represents the population of a town x years after it was established. what was the original population of the town?