Find the difference: 29.03 - 13.08

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

What is the domain of the step function f(x)=[2x]-1?

If the class creates a histogram of the data in table, how many students are in the range 12cm to 13.9 cm