I need a hard 8th-grade math question (ON LEVEL) please don't give me the answer also tell me how I can use it in real life

Awrestling tournament begins with 128 competitors. in the first round, each competitor has 1 match against another wrestler. the winner of each match moves on to the next round until there is a winner. write a sequence in which the terms represent the number of players still in the tournament at the end of each round. describe the sequence? how many rounds are in the tournament?

How do i work this problem out using the equation a=pe^rt

What scale factor was applied to the first rectangle to get the resulting image interior answer as a decimal in the box