Respuesta :

Answer:

16 rolls of ribon

Step-by-step explanation:

C = Dπ

d = r x 2

d = 100 x 2

d = 200

C = 200 x 3.14

C = 628

628 / 40 = 15.7

she should buy 16 rolls

The answer I got would be 16 rolls per each ribbon