math
posted by Kamya .
Which choice offers the lowest cost per ounce? 6oz for 42 cents? 8oz for 64 cents? or 4oz for 36 cents? This is 5th grade math assignment?

math 
Reiny
42 cents/6 oz = ...
64 cents/8 oz = ...
36 cents/4 oz = ...
which answer is the lowest?
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