A5 foot long board is propped against the wall of a house. the board forms a
60° angle with the ground. how far is the base of the board from the wall?

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