Determine the largest group of people that can meet if no two people have the same three initials. I know that the answer is 17,576 but I don't understand how to set it up, if someone could show steps that would be great. (This is a combinatorics question.)

Crickets can jump with a vertical velocity of up to 14 ft/s. which equation models the height of such a jump, in feet, after t seconds? h(t) = –16t2 + v0t + h0 h(t) = –16t2 + v0t + 14 h(t) = –16t2 + 14t h(t) = –16t2 + 14t + 14 what is the maximum height the cricket reaches? round to the nearest thousandth. h = feet