Tournament Rounds- Decay Rate

2. Each year the local country club sponsors a tennis tournament. Play starts with 128 participants. During each round, half of the players are eliminated. How many players remain after 5 rounds? At what round does the tournament can't be played anymore? Chart the decay rate.

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... Chart the decay rate.

Players at the beginning of the tournament= 128

Players at the end of rounds

Round # Players left
0 128
1 64 =128/ 2
2 32 =64/ 2
3 16 =32/ 2
4 8 =16/ 2
5 4 =8/ 2
6 2 =4/ ...