1 gallon = 160 ounces
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×
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×
Cancel out common unit gallon
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1 hour = 60 minutes1 minute = 60 seconds
\So 1 hour = 60 × 60 seconds
\1 hour = 3600 seconds
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Replace hour with 3600 seconds
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Simplify 
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= 0.044 ounces per second
= 0.04 ounces per second