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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

The unit rate for the first one is 98 yd/sec. 30 ounces for $3.48 is S8.62/oz. It is the best buy.

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