Find 'n'

Divide both sides by 4500:

1.05^n = 5469.78/4500

Take logs of both sides and use the fact that log(x^n) = n*log(x)

n*log(1.05) = log(5469.78/4500)

Divide both sides by log(1.05)

n = log(5469.78/4500)/log(1.05)

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