# Charge Model#

The quantity of charge through a conductor is modeled as $$\textrm{Q}=$$ 50$$\rm{t^4}$$ $$\rm{mC \over s^4}$$ - 44$$\rm{t}$$ $$\rm{mC \over s}$$ + 50 $$\rm{mC}$$. What is the current at time $$\textrm{t} =$$ 29 $$\textrm{s}$$?