9. On Monday, Zach sends an e-mail message to 4 friends. On Tuesday, each of these
friends forwards the message to 4 people. On
Wednesday, each of these people forwards
the
message to 4 other people.
(1.5)
a) How many people were sent the message
on Wednesday? Explain how you know.
b) Show how to use powers to describe the
number of messages sent on Wednesday.
c) How many people will be sent the
message on Sunday if this daily
process of forwarding continues?
Explain your reasoning.
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