Answer:
4 invitations
Step-by-step explanation:
The diameter of the circles is:
[tex]d=12cm[/tex]
and she wants to put a ribbon around the edge of each, so we need to know how much the circumference of the circles measures (the perimeter):
[tex]c=d*\pi[/tex]
replacing the diameter value:
[tex]c=12\pi[/tex]
And since she have 180 cm of ribbon, she can only make:
[tex]\frac{180}{12\pi} =\frac{180}{12*3.1416} =\frac{180}{37.7} =4.77[/tex]
She can make 4.77 invitations, which means she can only make 4 complete invitations.
