Margaret bought all of last year's Christmas gifts using a single credit card. Her card has an APR of 17.99% and she must pay at least 4% of the balance at the end of each month. If her carry-over balance for this month is $1,040.19 and she has made no additional purchases, what would Margaret's finance charge be at the end of the month?

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

The answer is 76° i believe