Sb plz help not much a lot of points Plz help

When y’all answer can y’all explain too !

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

The function show two sisters' savings account and the rate at which they plan to deposit money