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find the zero of this function with a calculator

0=5500(0.7)^t -3100
Guest Mar 27, 2012
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0=5500(0.7)^t -3100
3100=5500(0.7)^t
3100/5500=(0.7)^t
t=log(3100/5500, 0.7)

[input]log(3100/5500, 0.7)[/input]

validation:
[input]5500(0.7)^(1.6074747903957) -3100[/input]
admin  Mar 27, 2012

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