Question

The population of locusts in a certain swarm doubles every two hours. If 4 hours ago there were 1,000 locusts in the swarm, in approximately how many hours will the swarm population exceed 250,000 locusts?A. 6B. 8C. 10D. 12E. 14

Answer 1

4 hours ago = 1,000

2 hours ago = 2,000

Now = 4,000

In 2 hours = 8,000

In 4 hours = 16,000

In 6 hours = 32,000

In 8 hours = 64,000

In 10 hours = 128,000

In 12 hours = 256,000

The answer would be D. 12 hours.