To answer this question, we need to find the unit rate for each of the options in the question so we can find the stores that sell mangos at a lower unit price. For this, we need to divide the value of the mangos by the weight of each of them. Then, we have:
Store A:
The unit rate is:
[tex]p_A=\frac{6.56}{2}\Rightarrow p=3.28[/tex]Then, store A sells mangos for $3.28 per pound.
We can continue with the rest of the stores following the same procedure:
Store B:
[tex]p_B=\frac{7.65}{3}\Rightarrow p_B=2.55[/tex]Store B sells mangos for $2.55 per pound.
Store C:
[tex]p_C=\frac{13.84}{4}\Rightarrow p_C=3.46[/tex]Store C sells mangos for $3.46 per pound.
Store D:
[tex]p_D=\frac{3.50}{2}\Rightarrow p=1.75[/tex]Store D sells mangos for $1.75 per pound.
Therefore the Stores that sell mangos at a lower price than $3.23 are:
• Store B sells mangos for $2.55 ($2.55<$3.23) per pound.
,• Store D sells mangos for $1.75 ($1.75 < $3.23) per pound.
Thus, the correct options are B and D.