Answer:
C. 6 placemats
Step-by-step explanation:
Mindy has 200 feet of ribbon and each placemat requires 30 feet of ribbon.
Now, we need to divide 200 by 30.
200/30 ≈ 6.66666666667
Now, what whole number is before 6.66666666667?
6.
Now, what whole number is after 6.66666666667?
7.
What is 7 x 30?
210.
What is 6 x 30?
180.
Mindy has only 200 feet of ribbon, so she can't make 7 placements because 200 < 210, but she can make 6 placements because 200 > 180.