Joe and martina both retire the same year and are the same age. however, martina receives more in social security benefits than joe. how could this be the case? a. martina had more children than joe, which increases her benefit. b. martina started contributing at a much earlier age. c. joe earned more money over his lifetime than martina. d. joe had a pension and 401(k), but martina only had social security.

Best answer that i found on yahoo ok   set :   x= length of 2nd piece in cm  x- 3= length of 1st piece in cm  x-4= length of 3rd piece in cm  then since you know they all came from the 20 cm ribbon you add them together and set them equal to 20x+ x-3 +x-4 = 20  3x - 7= 20  3x= 27  x= 9  the shortest piece is the third piece which is x- 4  x-4  9-4 = 5  the length of the smallest piece is 5 cm.  the other lengths are  9 cm  6 cm

Maybe the answer is 20mm. all i really did was just multiply, which is obvious.