a. For an exponentially growing population, calculate max (units?) based on the data below

b. Calculate the specific growth rate () of the population above growing at a substrate concentration of 25 mg/L according to Monod kinetics with a k_s of 50 mg/L.

c. Consider two genetically engineered organisms intended for use in the cleanup of hydrocarbon spills into the ocean. Bacterium alpha has a _max of 1 d^-1 and a ks of 0.1 mg/L. Bacterium beta has a _max of 5 d^-1 and a ks of 5 mg/L. If the hydrocarbon concentration is initially 1000 mg/L and the desired objective is to reduce concentrations below 0.1 mg/L what order of addition of the bacterial species is desired?

\begin{tabular}{|c|c|} \hline Time (d) & Biomass (mg/L) \\ \hline 0 & 50 \\ \hline 1 & 75 \\ \hline 2 & 111 \\ \hline 3 & 166 \\ \hline 4 & 248 \\ \hline 5 & 369 \\ \hline \end{tabular}