I need someone who can help with natural log logarithms and chemistry. I only have two hours to do it so items will be sent and I will need them back within two hours from the time sent. I would e

I need someone who can help with natural log logarithms and chemistry.   I only have two hours to do it so items will be sent and I will need them back within two hours from the time sent.  Just let me know when you are free  to work.   I would expect it really would only take about 30 minutes top from someone who knows math well.   The test is only about 15 questions.  This is a college-level course.  Example question if the initial residue concentration of a chemical in the  juice of an orange is 10 ppm and 10 days later the concentration has decreased to 7 ppm, the value of k

Cr = Cie-kt

7 = 10e-10k

0.7 = e-10k

ln 0.7 = -10k

-0.3567 = -10k