will wants to have more than $500 by the end of the summer. he already has $84, and he can work for 8 weeks over the summer. will gets paid the same amount each week.

which of the following represents the amount of money he must earn each week?
x ≥ $52
x > $52
x ≥ $63
x > $63

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