PLEASE HELP: A summer camp tournament starts with 1024 players. After each round, half the players are eliminated. How many players remain after 7 rounds?

I know the answer is 8, but I want to know how to solve it.

Asinusoidal function whose frequency is 1/6pi

What is the midpoint of np if n (1,9) and p (-5-1)

How many revolutions will a car wheel of diameter 28 in. make over a period of half an hour if the car is traveling at 60 mi/hr? the final answer is supposedly 21,609 but i have no idea how to get that, show work : )