A pollutant’s concentration in a lake decreases over time at a rate directly…
MATHEMATICS · Subjective · AP · Calculus AB · Differential Equations · Differential Equations
Problem
A pollutant’s concentration C(t) in a lake decreases over time at a rate directly proportional to its current concentration.
(a) Write the differential equation that represents this situation, using k for the proportionality constant.
(b) Specify the sign of k.