college math logarithmics

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If we start with q0 milligrams of a certain element, the amount q remaining after t years is given by the formula 

q = q0(2)t/1500.
 Express t in terms of q and q0.
Apr 17th, 2015

Take logarithms of both sides: ln(q) = ln(q_0) + (-t/1500)*ln(2).

(-t/1500)*ln(2) = ln(q) - ln(q_0);

t = 1500*[ln(q_0) - ln(q)]/ln(2).

Apr 17th, 2015

thank you!!!

Apr 17th, 2015

You are welcome.

Apr 17th, 2015

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Apr 17th, 2015
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Apr 17th, 2015
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