I am not sure which one is which

Find the total area for the regular pyramid ( follow the answer set up in the picture)

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

What is always true about a positive integer raised to a negative odd power?