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Math Help - How can i solve the problem?

  1. #1
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    How can i solve the problem?

    solve the equation
    5=580e^(-t(ln2)/7.2)


    what is the final answer for t?
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  2. #2
    Senior Member vincisonfire's Avatar
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     5=580e^{\frac{-t(ln(2))}{7.2}}
     ln(5)=ln(580e^{\frac{-t(ln(2))}{7.2}}) = ln(580) + ln(e^{\frac{-t(ln(2))}{7.2}})
     ln(5) - ln(580) = \frac{-t(ln(2))}{7.2}
     \frac{7.2}{ln(2)}(ln(5) - ln(580)) = -t
     \frac{7.2}{ln(2)}(ln(\frac{580}{5})) = \frac{7.2}{ln(2)}(ln(116)) = t
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  3. #3
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    thanks a lot!!!~ have a nice weekend
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