Billy M. answered • 07/16/18

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1000=500(1+.08/2)^(2*t)

1000/500=(1.04)^2t

2=(1.04)^(2t)

ln(2)=ln(1.04)^(2t)

ln(2)=2tln(1.04)

ln(2)/ln(1.04)=2t ------ solve this for 't' and your answer