Expressions that are equivalent to (2n+6)(n+3)

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Aproduction manager test 10 toothbrushes and finds that their mean lifetime is 450 hours. she then design sales package of this type of toothbrush. it states that the customers can expect the toothbrush to last approximately 460 hours. this is an example of what phase of inferential statistics

Joanie watched 1 out of three of a movie in the morning