Heather sees that two stores have similar sales. store a says that 5 balloons will cost her $6.00 and store b says that 13 balloons will cost her $16.25. if she is planning on buying 27 balloons and wants to spend as little money as possible, which store should she buy from and how much would it cost her?
a) store a and it would cost $32.40
b) store a and it would cost $33.75
c) store b and it would cost $32.40
d) store b and it would cost $33.75

Store A and it would cost $32.40 (answer choice A)

Step-by-step explanation:

Let's start by studying how much she would pay for a single balloon on each store:

In store A: (5 balloons for $6) then per each balloon: $6/5 = $1.2 per balloon.

In store BA: (13 balloons for $16.25) then per each balloon: $16.25/13 = $1.25 per balloon.

This shows us that the better price is in store A if she wants to pay as little as possible. Now, at that price, if she wants to buy 27 balloons, she will be paying (27 times $1.2): 27 * $1.2 = $32.40

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step-by-step explanation:

1/4 because there is 4 grades.