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What are the first 4 terms in the multiplication pattern given by the formula 2×4n

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

Combine like terms to make a simpler expression 3z+z