Gent dose at 10:26am over 30 minutes and levels were reported as 3.6 at 13:07 and 1.2 at 16:59. Calculate k.

Question

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Answer 1

K=ln(3.6/1.2)/timeelapsed

k=ln(3)/(1307-1056)=ln(3)/2:11
k= ln(3)/(131min) or ln3/2.18 hr

Answer 2

K=0.50 is this correct?

Answer 3

yes, but you need to include units:
.50/hr

Answer 4

Thank you!