Posted by **pam** on Thursday, February 11, 2010 at 11:18pm.

whats the unit rate:

882 yd in 9 secs

A grocery store sells four different jars of peanut butter. Determine which is the best buy, based on the cost per unit.

14 ounces for $1.44 20 ounces for $1.88

30 ounces for $3.48 38 ounces for $4.10

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