In a tennis competition, 128 players were selected for a series of knockout rounds. In each round the losers were eliminated and the winners reached the next round. How many players moved to the next round after 4th round? Express this number in the exponential notation in terms of the initial number of players.

Express the following in centimetres (cm) in exponential notation :

(i) 98 hm

(ii) 156 km

(iii) 371 m

(7 - 5)⁵ is equal to :

1. 6
2. 8
3. 16
4. 32

(-5)⁴ is equal to :

1. 20
2. -125
3. 625
4. -1024