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**1. The problem statement, all variables and given/known data**

If x = (7.2[tex]\pm[/tex]0.6) m, determine the value of ln x with its associated uncertainty.

(Ans is 1.97[tex] \pm [/tex]0.08)

**2. Relevant equations**

[tex]A = k{B^m}{\rm{ }} \Rightarrow {\rm{ }}\frac{{\Delta A}}{A} = m\frac{{\Delta B}}{B}[/tex]

(perhaps?)

**3. The attempt at a solution**

i tried to ln7.2 and got 1.97, however ln0.6 = negative value. How to get 0.08?

Thanks