Suppose that shoe sizes of american women have a bell-shaped distribution with a mean of 8.37 and a standard deviation of 1.49. using the
empirical rule, what percentage of american women have shoe sizes that are no more than 9.86? do not round your answer.
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2+2-9-$29: ! 3$3$282! 2! 2

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