A group of students measured the density of a copper cube to be 8.44 g/mL. When they looked at the density table for copper it read 8.94 g/mL. Calculate the percent error.

the population of unionid mussels in the hudson river decreased after zebra mussels were introduced. zebra mussels, a nonnative species, competed with the unionid mussels for food. the zebra mussels were able to outcompete the unionid mussels, allowing the zebra mussel population to increase dramatically over six years. the unionid mussel population decreased due to a lack of food.

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