A right triangle has a leg with a length of 21 and a hypotenuse with a length of 42. Eunice notices that
the hypotenuse is twice the length of the given leg, which means it is a 30-60-90 triangle.
Which of the following statements are correct? Select all that apply.

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