Solve using a proportion. Round your answer to the nearest hundredth when necessary.Find which is the better buy (lower cost per ounce) by finding each unit price rounded to three decimal places if necessary. Shampoo:$4.60 for 20 ounces  $2.07 for 9 ounces

A. $4.60 for 20 ounces
B. $2.07 for 9 ounces
C. Both cost the same per ounce.


Answer: C

Mathematics

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