4 more questions left on my test im literally wasting my gb on screenshots of my test lol

Anyone know? will mark brainliest if you're correct!

Find the area of the triangle shown 3 by 6

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