If 7 ounces of cola costs $.59. how much should 19 ounces costs?

$5.31

Step-by-step explanation:

If you times $.59 seven times you will get $4.13.  

Then, you will have to add $.59 two times.

Finally, you will get $5.31 .

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3

step-by-step explanation:

divide 13.5 by 9 to get the scale factor. it equals 1.5

2 * 1.5 = 3