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A chain letter tells you to send copies to five friends.
A.Complete the table ( I completed the table already, here is results:

(First number=Round ; second number=Number of letters sent)

1,5 2,25 3,125 4,625 5,3125 6,15625 7,78125 8,390625 9,1953125 10, 9765625

NOW HERE IS WHERE I'M REALLY STUCK!!!
B.Write an expression for the number of letters sent during round "n".
C.Which round will have sent out more than a billion letters, check with a calculator

HELP!!!!!!!!!!!!!!
smartbutcute09  Apr 11, 2012
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5^n

[input]5^n = 1e9[/input]
admin  Apr 11, 2012

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