1 Calculate rate of interest in decimal, solve for r. 2  r = (A/P) 1/t - 1. 3  Calculate rate of interest in percent. 4  R = r * 100. 5  Calculate time, solve for t. 6  t = t = ln(A/P) / ln(1 + r) = [ ln(A) - ln(P) ] / ln(1 + r).
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Donald Trump crowns another winner as his finalists battle it out in the boardroom on the season finale of the NBC competition on Monday. As Emmy Award winner Leeza faced off with Fox News legend Geraldo Rivera for the title, Donald Trump admitted to her that he was 'surprised you made it this far.'.