How do i write a equation for the function of 5 less then 3 times

Which rational number could be graphed between -4 and -5

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?

F(x) = 1/x g(x)=x-4 can you evaluate (g*f)(0) ? why or why not?