The ski trip has to be cancelled. All 28 people must be told. In the first hour 2 people each call 2 people. The next hour each of the people called the hour before calls 2 people, and so on. How many hours will it take for all 28 people to be called?

Answer 1

1 hour -- 4
2 -- 8
3 -- 16
4 -- 32

Answer 2

Not understanding I am getting 3hrs for 28 people

Answer 3

In the first hour, 2 * 2 = 4 people know.

In the second hour, each of those 4 people call 2 others -- so now 8 people know.

Etc.

Answer 4

I see thank you!

Answer 5

You're welcome.