Jared sells square frames of various sizes made of wood. to find the area of a frame, jared uses the formula a = s^2 - (s - 2w)^2, where s is the length of a side of the frame and w is the width of the frame.
part a.)what does each term in the formula represent?
part b.) find the area of a frame that measures 20 inches on each side and has a width of 3 inches
part c.) jared charges 18 cents per square inch for his frames. how much will he charge for a frame that measures 16 inches on each side and has a width of 2 inches?

An annual marathon covers a route that has a distance of approximately 26 miles. winning times for this marathon are all over 2 hours. the following data are the minutes over 2 hours for the winning male runners over two periods of 20 years each. earlier period 14 12 15 22 13 10 19 13 9 14 20 18 16 20 23 12 18 17 6 13 recent period 7 11 7 14 8 9 11 14 8 7 9 8 7 9 9 9 9 8 10 8 (a) make a stem-and-leaf display for the minutes over 2 hours of the winning times for the earlier period. use two lines per stem. (use the tens digit as the stem and the ones digit as the leaf. enter none in any unused answer blanks. for more details, view how to split a stem.) minutes beyond 2 hours earlier period 0 1 2 (b) make a stem-and-leaf display for the minutes over 2 hours of the winning times for the recent period. use two lines per stem. (use the tens digit as the stem and the ones digit as the leaf. enter none in any unused answer blanks.) minutes beyond 2 hours recent period (c) compare the two distributions. how many times under 15 minutes are in each distribution