18000=40000(1-.08)^t

18000=40000(1-.08)^t solve
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1 Answer

40000(1-0.08)^x =18000

(1-0.08)^x=18000/40000=0.45

0.92^x=0.45

log(0.92^x)=log(0.45)

x*log(0.92)=log(4.5)

x=log(4.5) /log(0.92)

=0.653212513/ (-0.036212172)

=-18.0384789
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