Jamie drop the quarter from a height of 6 feet above the ground and into a wishing well whose bottom was 5 feet below ground level. write an expression representing the change in elevation of the quarter. how far did the quarter travel?

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