Sandra has ribbons that are 3/4 yard, 2/6 yard, and 4/7 yard long. She needs to use the ribbon longer than 2/3 yard to make a bow. Which length of ribbon could she use for the bow.

2/3 = 0.667

3/4 = 0.75
2/6 = 0.333
4/7 = 0.57

3/4

To determine which length of ribbon Sandra could use for the bow, we need to compare the lengths of the ribbons she has to the minimum requirement of being longer than 2/3 yard.

The lengths of the ribbons Sandra has are:

1. 3/4 yard
2. 2/6 yard (which can also be simplified to 1/3 yard)
3. 4/7 yard

Now, let's compare each of these lengths to 2/3 yard:

1. 3/4 yard: Since 3/4 yard is larger than 2/3 yard, Sandra can use this ribbon length for the bow.
2. 1/3 yard: Since 1/3 yard is smaller than 2/3 yard, Sandra cannot use this ribbon length for the bow.
3. 4/7 yard: Since 4/7 yard is larger than 2/3 yard, Sandra can also use this ribbon length for the bow.

Therefore, Sandra can use either the ribbon that is 3/4 yard long or the ribbon that is 4/7 yard long to make the bow.