Which measurement shows a valid estimate for
this ruler?
2.3 cm
2.35 cm
2.350 cm

Well to my expert knowledge and my exquisite calculations i think the the negative ion # 412 is the key to sucess

The population of unionid mussels decreased after zebra mussels were introduced. zebra mussels competed with the unionid mussels for food. the zebra mussels were able to displace the unionid mussels, allowing the zebra mussel population to increase  over the years. the unionid mussel population decreased because  of lack of food.