Question $5$

$1$ pts

Problem $2-26(2)$: If the effluent from the lagoon needs to be $10mg.($instead of $20$ as stated in the problem$),$ what should be the reaction rate then? Report your answer to two significant digits.

Question $6$

$1$ pts

Probiem $2-26(3)$: What is the hydraulic residence time $($d$)$ in this lake?