A population of bacteria is growing in a lab culture. After a certain time a chemical that is toxic to the bacteria is introduced ents and the population begins to decline. The total bacteria population in grams at time t is given by Q(t) = 200e (t-10)2 with t the number of hours since the experiment began. At what time t is the toxic chemical introduced (that is, when does the population reach its maximum and begin to decline)? 1.3 O e- 10 hours Schedule O 4 hours llery 100 hours 400 hours 10 hours