Answer: There are 0.052 bags she will needed to use for each square yard.
Explanation:
Since we have given that
Number of bags of mulch to cover 12 yards of edible flower beds = 7.5
And, we need to calculate the number of bags she use for each square yard,
![\text{ Number of bags for each square yard }\\\\=(7.5)/(12* 12)\\\\=0.052\text{ bags per square yard}](https://img.qammunity.org/2019/formulas/mathematics/high-school/8uype4fhbe5kj29pwkxezkie3z5bca7cth.png)
So, there are 0.052 bags she will needed to use for each square yard.