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Mathematics 15 Online
OpenStudy (anonymous):

the question is in the picture.

OpenStudy (anonymous):

OpenStudy (anonymous):

Oh and finding the better buy.

OpenStudy (mr.math):

Can you find the price of one oz of cereal in each case?

OpenStudy (anonymous):

Well, can you show me how to do this??

OpenStudy (mr.math):

That's what I'm doing.

OpenStudy (anonymous):

Oh sorry thanks, 12? or 16?

OpenStudy (mr.math):

You need to find the price of one oz of cereal in each case and compare them, the better price is the one with the smaller value.

OpenStudy (anonymous):

Right, my teacher also mentioned getting more of something to for less.

OpenStudy (mr.math):

Okay, Case1: 12 oz for $3.95 means \(\frac{3.95}{12}\approx=0.25\) for each oz. Case2: 16 oz for $4.80 means \(\frac{4.80}{16}\approx 0.3\) for each oz.

OpenStudy (mr.math):

Which one do you think is better?

OpenStudy (mr.math):

Wait!

OpenStudy (anonymous):

price over amount right? Then divide? and compare?

OpenStudy (mr.math):

The first one \(\frac{3.95}{12} \approx 0.33\), sorry!

OpenStudy (mr.math):

And yeah, that's how you do it.

OpenStudy (anonymous):

Thanks! And is that the key for all of them?

OpenStudy (mr.math):

Yeah, for any problem of this type. You need just to find the price of one unit and compare them.

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