Answer: There are 0.052 bags she will needed to use for each square yard.
Step-by-step 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,
[tex]\text{ Number of bags for each square yard }\\\\=\frac{7.5}{12\times 12}\\\\=0.052\text{ bags per square yard}[/tex]
So, there are 0.052 bags she will needed to use for each square yard.