Suppose you want to crop (remove) 4 inches from the width of a photo. After you have cropped (reduced) the width of the photo by 4 inches, you resize the photo by making it 40% of its cropped size.
(a) If x is the original width of the photo and the function f determines cropped width of the photo (in inches) in terms of x, write a formula to define f.
(b) If n represents the width (in inches) of the cropped photo, define a function g to determine the width (in inches) of the resized photo in terms of n.
(c) What is the final cropped and resized photo width if the original photo was 19 inches wide?