Please help! i legit cannot keep going unless i get a 100% on this! all help is appreciated:)

Need 50 will mark brainliest answer. find the lengths of all the sides and the measures of the angles.

Could someone with number 1 and 2

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