What is the midpoint between -2-3i and 3+9i

Aboat costs 19200 and decreases in value by 12% per year. how much will it cost in 5 years

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

Someone which statements are true? check all that apply.