Your school has a telephone chain to notify people of weather-related school cancellations. In the first round of calls, the school secretary calls two different homes. In the second round, each of those families call two other families. Each family has to make only two calls, but the chain is still a fast way to notify a lot of people.
How many families are called in the fifth round of calls?
How many rounds are needed to call all 123 families at your school?
Explain your answer in as many ways as you can think of, you get extra points for each additional method.
Due back to ETTC by, Friday May 24 at 5pm.
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