Luis lives 0.8 miles from school his friend Rina lives 0.23 miles from school Luis draws this model to find out how much closer rina lives from the school then he does Which equation does the model represent

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