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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Kamala Harris breaks a color barrier with her U.S. Senate win. California voters elected Kamala Harris, the daughter of immigrants from India and Jamaica, to the U.S. Senate on Tuesday, tearing down a color barrier that has stood for as long as California statehood. The Associated Press called the race minutes after the polls closed, with no votes yet reported.