Sarah is buying flour for her bake shop. The prices of four types of flour are listed. wheat flour- 5lb for $12.50
Rice flour- 8lb for $24.00
Corn flour- 15lb for $33.75
soy flour- 24lb or $55.20

which type of flour costs the least per pound?

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

Ais the answer for your question

$18.25 ($365 divided by 20)