One side of a square is 5 and 1/2 inches Long find the length of its diagonal give the exact answer

One integer is 8 times another. if the product is 72, then find the integers

Kari plans to sample 20 people of a population that contains 100 students. she wants to determine how many people wake up before 6 a.m. which sample is the most random?

Guys, i have a life question. so my bff that i met in school (i had to switch schools) decided she was gonna quit a game that was our only communication. she said she is never gonna be on againand i'm sad because she never responds to my texts.which means probably no more sleepovers, no more going to each others house, and no more camping together : ( all of those activities happen because i texted her on that game. what do i do?