$15.00/11 pounds = $1.3636 per pound$20.00/16 pounds = $1.25 per pound 1.363636 - 1.25 = $0.113636 per pound, less
1.363636 × 20 = $27.27 original price for 20lb
I think 1 because if you had 2 you'll end up with a shape that is greater than 180 degrees. Keep in mind obtuse angles a over 90 degrees. hope that helped
