Need help on my spring break packet

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

Solve for x and select the correct answer

Suppose that g(x)=f(x+9) which statement best compares the graph of g(x) with the graph of f(x)