Find the circumference of the largest circle that can be inscribed inside a square whose side is 5" ( with explanation )

The heaviest 16% of all men in weight weigh more than how many pounds ?

Average acceleration: i have no idea how to do this.

Afamily has five members. a mom, a dad, two sisters, & a brother. the family lines up single file. what is the probabillity that the mom is at the front of the line