It takes 42. 0 min for the concentration of a reactant in a first-order reaction to drop from 0. 45 m to 0. 32 m at 25°c. How long will it take for the reaction to be 90% complete?.

Asoccer team has played 25 games and has won 60% of the games it has played. what is the minimum number of additional games the team must win in order to finish the season winning 80% of the games it has played?