Hadley's softball team has a phone tree in case a game is canceled. the coach calls 3 players . then each of those player's calls 3 players and so on . how many players will be notified during the third round of calls

In the 1st round of calls, 3 peope are notified. In the 2nd round, 9 people are notified (3 people + 3 calls each = 9). In the final round, 27 people are notified ( 9 people + 3 calls each [9x3] = 27) Hope this helps :D