Drug Concentration Decay Problem

[evilpostingmong]

Homework Statement

The concentration of a particular drug in a patient’s bloodstream declines at a rate proportional
to the concentration, with constant of proportionality k = 0.2 if time is measured in hours. If
the concentration of the drug in the patient’s bloodstream is 10mm/ml (millimoles per milliliter)
shortly after the injections, what will the concentration be 12 hours later?

Homework Equations

The Attempt at a Solution

Just want to know if I set this one up correctly.
dC/dt=-kC
If I didn't, don't be afraid to rip it apart :D.

 

[Dick]

That looks like what the problem is asking for all right.

 

[evilpostingmong]

Okay, thanks! Then I must've messed up when I integrated it.