A Convenience store sells two brands of orange juice.Brand A contains 8 fluid ounces and cost $1.28.Brand B countains 12 fluid ounces and cost $1.68.What is the difference in cost,in dollars,per fluid ounces between the two brands of juice?

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Answer 1 · 2018-08-06T07:07:16

Brand B is cheaper by $0.02 per fluid ounce.

As a rule, "of" means multiply, and "per" means divide.

We have been asked for "cost, in dollars, per fluid ounces".

We need to divide cost, in dollars, by fluid ounces.

Brand A:

$$ \frac{1.28}{8} = $ 0.16$ $$1.28 / 8 = $0.16$ per fluid ounce.

Brand B:

$$ \frac{1.68}{12} = $ 0.14$ $$1.68 / 12 = $0.14$ per fluid ounce.

The difference between brand A and brand B is $0.02 per fluid ounce, with brand B being cheaper.

Answer 2 · 2018-08-06T07:13:09

Brand A is expensive. Unit costs are $$ 0.16$ $$0.16$ for Brand A and $$ 0.14$ $$0.14$ for Brand B.

Let me find cost of per ounce first.

Brand A $cos t = \frac{$ 1.28}{8} = $ 0.16$ $Cost=($1.28)/8 = $0.16$ per ounce.

Brand B $cos t = \frac{$ 1.68}{12} = $ 0.14$ $Cost=($1.68)/12 = $0.14$ per ounce.

The difference is:

$$ 0.16 - $ 0.14 = $ 0.02$ $$0.16-$0.14 = $0.02$ per ounce.

Brand A is more expensive (2 cents) compared to Brand B in terms of cost of per ounce volume.