A chemical reagent is introduced into a bacterial population, and t hours later the number of bacteria (in thousands) is N(t) = 1100 + 21t2 - t3 (for 0 ≤ t ≤ 21).
(a) When will the population be the largest?
T=
How large will it be?
thousand bacteria=
(b) When will the population be growing at the fastest rate?
T=
How fast?
thousand bacteria per hour=