Find the average rate of change for the given function on the given interval. f(x)=x^2-4x; -2< =x< =4 could anyone explain to me how to solve this ? i'm far behind in class . 15 points .

The floor plan of a room has a scale of 2.5 in.: 35 ft. in the drawing, the length of the room is 8 in. and the width of the room is 6 in. what is the perimeter of the actual room?

Enter the number of complex zeros for the polynomial function in the box. f(x) = x+ + 5x² +6

Mary beth used the mapping rule to find the coordinates of a point that had been rotated 90° counterclockwise around the origin. examine the steps to determine whether she made an error. m (3, –6) is rotated 90° counterclockwise. (x, y) → (–y, x) 1. switch the x- and y-coordinates: (6, –3) 2. multiply the new x-coordinate by –1: (6(–1), –3) 3. simplify: (–6, –3) .