MaKayla sells square frames of various sizes. To find the area of a frame, she uses the formula A=\:s^2-\left(s-2w\right)^2A = s 2 − ( s − 2 w ) 2,

where s is the length of the frame and w is the width of the frame.

1. What does each term in the formula represent?

2. Find the area of a frame that measures 15 inches on each side and

has a width of 2 inches.

3. MaKayla charges 20 cents per square inch for her frames. How

much will she charge for a frame that measures 18 inches on each

side and has a width of 3 inches?