What is the range of 12,20,18,25,6

Find the measures of the complement and the supplement of each angle, m

What is the factored form of the following expressions? d^2 – 13d + 36

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