Using the international system of units, which of the following units of measure would you likely use to indicate the distance between two cities?

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 13 + w/7= -18 (w/7 is a fraction)

A+b= 17, ab=70, find the value of |a-b|