Question 1167886
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The unknown is in an exponent, so you will have to use logarithms (or a tool like a graphing calculator).<br>
{{{1000 = 250(1.03)^t}}}
{{{4 = (1.03)^t}}}
{{{ln(4) = t*ln(1.03)}}}
{{{t = ln(4)/ln(1.03)}}}<br>
Time for the calculator....<br>